OE Match

HVAC Heater Feed Hose – Feed

Restore the reliability of your Porsche's cooling and heating system with this OE Heater Feed Hose.

Fits:

• Porsche 996 C2 3.6L 09/01-2005 (Tiptronic only)          
• Porsche 996 C4 3.6L 09/01-2005 (Tiptronic only)     
• Porsche 996 C4S 3.6L 09/01-2005 (Tiptronic only)     
• Porsche 996 TURBO 2000-05
• Porsche 997 MK1 Carrera 2 3.6L 2005-08
• Porsche 997 MK1 Carrera 2S 3.8L 2005-08
• Porsche 997 MK1 Carrera 4 3.6L 2005-08
• Porsche 997 MK1 Carrera 4S 3.8L 2005-08
• Porsche 997 MK1 TURBO 2007-09
• Porsche 997 MK1 GT2 2007-09
• Porsche 997 MKII GT3 / GT3 RS 2010-11

Diagram ref no 17 

Designed to meet or exceed original equipment specifications, this high-quality replacement hose carries hot engine coolant from the engine to the heater matrix (heater core), enabling the HVAC system to provide efficient cabin heating, rapid windscreen demisting and consistent climate control performance.

Manufactured from premium automotive-grade rubber with reinforced construction, this OE Match hose is engineered to withstand the high temperatures, pressures and continual thermal cycling experienced within the Porsche cooling system. Offering excellent fitment and long-term durability, it provides an ideal replacement for ageing or deteriorated original hoses at a competitive price.

Whether you're repairing a coolant leak, refreshing the cooling system or carrying out preventative maintenance, replacing worn heater hoses helps maintain the reliability and efficiency of your Porsche.

What Does the Heater Feed Hose Do?

The heater feed hose forms part of the engine's coolant circuit, carrying heated coolant from the engine to the heater matrix located within the dashboard.

As warm coolant flows through the heater matrix, the vehicle's blower motor forces air across it before directing the heated air into the cabin. This allows the system to provide:

• Efficient interior heating
• Rapid windscreen demisting and defrosting
• Consistent climate control performance
• Comfortable cabin temperatures throughout colder months

Although relatively simple in design, the heater feed hose plays a vital role in both passenger comfort and the overall operation of the cooling system.

Why Do Heater Feed Hoses Fail?

Heater hoses operate in one of the harshest environments on the vehicle, continually exposed to high coolant temperatures, pressure fluctuations and engine vibration.

Over many years of service, the rubber gradually deteriorates due to:

• Constant heating and cooling cycles
• Age-related hardening and loss of flexibility
• Internal degradation caused by coolant additives
• Surface cracking and perishing
• Swelling from contamination
• Fatigue around hose ends and retaining clips
• Abrasion against surrounding engine components

As deterioration progresses, small coolant leaks can develop before eventually leading to hose failure and rapid coolant loss.

When Should the Heater Feed Hose Be Replaced?

Because coolant hoses naturally age over time, Porsche specialists often recommend inspecting them during every major service and replacing them whenever significant cooling system work is undertaken.

Replacement is advised if you notice:

• Visible coolant leaks or staining
• Cracked, brittle or hardened rubber
• Bulging or swollen sections
• Dampness around hose connections
• A sweet coolant smell after driving
• Reduced cabin heating performance
• During engine-out repairs or cooling system refurbishment
• As preventative maintenance on older vehicles

Replacing ageing heater hoses before they fail can help prevent unexpected coolant loss, reduce the risk of engine overheating and avoid costly roadside breakdowns.

Porsche Cooling System & Heater Hoses

The cooling system on your Porsche does far more than regulate engine temperature. It also supplies heated coolant to the HVAC system, ensuring efficient cabin heating, effective windscreen demisting and year-round driving comfort.

As rubber hoses age, they gradually lose their elasticity and structural integrity, making them increasingly susceptible to leaks and sudden failure. Replacing heater hoses as part of routine maintenance is a sensible investment that helps maintain the integrity of the entire cooling system while reducing the risk of overheating caused by coolant loss.

OE Match replacement hoses are manufactured to provide factory-style fitment, dependable performance and excellent value, making them ideal for both routine servicing and complete cooling system overhauls.

Benefits of Replacing the Heater Feed Hose

Restores reliable coolant circulation Maintains efficient cabin heating Improves windscreen demisting performance Reduces the risk of coolant leaks Helps protect against engine overheating OE Match quality with factory-style fitment Ideal for preventative maintenance on ageing vehicles

Whether you're carrying out a routine service, repairing a coolant leak or restoring your Porsche to its original condition, Design911 supplies the trusted parts you need to keep your vehicle performing at its best.

• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 924 2.0L 1976-79
• Porsche 924 2.0L 1980-85
• Porsche 924 Turbo 2.0L 1979-81
• Porsche 924 Turbo 2.0L 1982-84
• Porsche 924 Carrera GT 2.0L 1981
• Porsche 924 Carrera GTS 2.0L 1982
• Porsche 944 2.5L 8V 1982-87
• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83  

• Electrically insulates steering wheel components.
• Helps ensure correct operation of the horn contact system.
• Maintains the correct positioning of the steering wheel assembly.
• Prevents unwanted electrical grounding.
• Replaces worn, cracked, or damaged insulating bushes.
• Supports reliable steering wheel and horn functionality.
• Provides an OE-style fit for straightforward installation.

• Horn operating intermittently.
• Horn sounding continuously without pressing the horn button.
• Excessive play within steering wheel components.
• Cracked, brittle, or distorted insulating bush.
• Electrical contact wear within the steering wheel assembly.
• Difficulty correctly assembling the steering wheel components.
• Damage identified during steering wheel refurbishment or restoration.

• The insulating bush is a small but essential component that electrically isolates parts of the steering wheel assembly while maintaining their correct alignment. If the bush becomes worn or damaged, unwanted electrical contact can occur, causing unreliable horn operation and reducing the overall integrity of the steering wheel assembly.
• Replacing a deteriorated insulating bush restores the proper insulation and positioning of the steering wheel components, ensuring dependable horn operation and preserving the original function of the steering system. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Insulating Bush for Steering Wheel provides reliable fit, performance, and durability for Porsche maintenance, repairs, and restoration projects.

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 914 (1970-1976)  

• Secures the track rod end to the steering arm.
• Provides reliable threaded retention of the steering joint.
• Works with a split pin to prevent the nut from loosening.
• Maintains the integrity of the steering assembly.
• Replaces worn, corroded, or damaged original fasteners.
• Supports safe steering system operation.
• Provides an OE-style fit for straightforward installation.

• Corroded or seized castle nut.
• Rounded or damaged castellations.
• Stripped or damaged threads.
• Difficulty achieving the correct tightening torque.
• Evidence of previous over-tightening or deformation.
• Split pin no longer aligning correctly with the castellations.
• Damage identified during steering or suspension servicing.

• The castle nut is a critical safety fastener within the steering system, securing the track rod end firmly to the steering arm while allowing the installation of a split pin to prevent accidental loosening. A worn, damaged, or corroded nut can compromise the security of the steering joint, affecting steering precision and potentially creating a serious safety risk.
• Replacing the castle nut whenever it shows signs of wear or during steering component replacement helps maintain the integrity and safety of the steering assembly. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Castle Nut M10x1 for Track Rod End provides reliable fit, performance, and durability for Porsche maintenance, repairs, and restoration projects.

• Porsche 356B 1959-63
• Porsche 356C 1963-65  

• Seals the opening around the windscreen wiper shaft.
• Helps prevent water, dirt, and debris from entering the bodywork.
• Protects the luggage compartment and cowl area from moisture.
• Supports correct positioning of the wiper shaft assembly.
• Replaces cracked, hardened, or perished original grommets.
• Restores the factory appearance of the wiper installation.
• Provides an OE-style fit for straightforward installation.

• Cracked, split, or perished rubber grommet.
• Water leaks around the wiper shaft.
• Moisture entering the luggage compartment or cowl area.
• Hardened, shrunken, or distorted rubber.
• Visible gaps around the wiper spindle.
• Corrosion developing around the mounting aperture.
• Damage identified during wiper mechanism servicing or restoration.

• The windshield wiper shaft rubber grommet is a small but essential sealing component that prevents water and contaminants from entering the body through the wiper shaft mounting point. A deteriorated grommet can allow moisture to reach vulnerable areas, increasing the risk of corrosion, water damage, and premature wear of adjacent components.
• Replacing a worn or damaged grommet restores the weatherproof seal, protects the surrounding bodywork, and helps preserve the correct operation and appearance of the windscreen wiper assembly. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Windshield Wiper Shaft Rubber Grommet provides reliable fit, performance, and durability for Porsche maintenance, repairs, and restoration projects.

• Porsche 356 1950-55
• Porsche 356A 1955-59
• Porsche 356B 1959-63
• Porsche 356C 1963-65

• Secures the wheel hubcap firmly to the wheel.
• Provides the correct spring tension for reliable hubcap retention.
• Prevents hubcaps from becoming loose or rattling.
• Replaces weakened, corroded, or damaged original springs.
• Helps maintain the factory appearance of the wheels.
• Supports safe and secure hubcap installation.
• Provides an OE-style fit for straightforward installation.

• Loose or rattling wheel hubcaps.
• Hubcaps that detach or become dislodged during driving.
• Corroded or rusted clamping springs.
• Bent, distorted, or broken spring clips.
• Reduced spring tension preventing secure hubcap fitment.
• Uneven hubcap seating on the wheel.
• Damage identified during wheel refurbishment or restoration.

• The hubcap clamping springs are essential for securely retaining the wheel hubcaps against the wheel rim. Correct spring tension prevents movement during driving, protecting the hubcap from vibration, rattling, and accidental loss while preserving the original appearance of the vehicle.
• Replacing worn or damaged clamping springs restores the secure fit of the hubcaps, helping to prevent costly damage or loss while maintaining factory-quality wheel presentation. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Hubcap Clamping Spring Set provides reliable fit, performance, and durability for Porsche maintenance, repairs, and restoration projects.

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 356 1950-55
• Porsche 356A 1955-59
• Porsche 356B 1959-63
• Porsche 356C 1963-65
• Porsche 914 (1970-1976)  

• Protects the oil pressure switch electrical terminal.
• Helps prevent moisture, dirt, and oil contamination from reaching the connector.
• Reduces the risk of corrosion at the electrical contact.
• Supports reliable oil pressure signal transmission.
• Replaces damaged, hardened, or missing protective caps.
• Helps maintain the integrity of the engine's electrical system.
• Provides an OE-style fit for straightforward installation.

• Missing oil pressure switch protective cap.
• Cracked, split, or hardened cap material.
• Corrosion on the oil pressure switch terminal.
• Loose-fitting or damaged cap.
• Dirt or moisture around the electrical connection.
• Intermittent oil pressure warning light caused by poor electrical contact.
• Damage identified during engine servicing or restoration.

• The oil pressure switch cap is a small but essential protective component that helps preserve the electrical connection between the oil pressure switch and the vehicle's wiring harness. Without adequate protection, moisture, dirt, and oil contamination can compromise the terminal, resulting in corrosion, unreliable electrical signals, and inaccurate oil pressure warning indications.
• Replacing a worn or missing cap restores protection to the electrical connection, helping to maintain dependable oil pressure monitoring and preventing unnecessary electrical faults. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Cap for Oil Pressure Switch provides reliable fit, performance, and durability for Porsche maintenance, repairs, and restoration projects.

• Porsche 356B 1959-63
• Porsche 356C 1963-65  

• Connects the steering column switch cable to the vehicle wiring harness.
• Provides a secure and reliable electrical connection.
• Ensures consistent transmission of electrical signals.
• Supports the correct operation of steering column-mounted controls.
• Replaces worn, damaged, or corroded original connectors.
• Helps maintain the integrity of the steering column electrical system.
• Provides an OE-style fit for straightforward installation.

• Intermittent operation of steering column switches.
• Failure of one or more steering column-mounted controls.
• Loose or unreliable electrical connections.
• Corroded or oxidised electrical terminals.
• Cracked, damaged, or heat-distorted connector housing.
• Evidence of overheating around the connector.
• Damage identified during electrical repairs or restoration.

• The round connector is a critical part of the steering column electrical system, providing the secure connection required for reliable communication between the steering column switch assembly and the vehicle's wiring harness. A deteriorated connector can cause intermittent faults, loss of switch functionality, and electrical reliability issues that can be difficult to diagnose.
• Replacing a worn or damaged connector restores dependable electrical continuity, supports the correct operation of steering column-mounted controls, and helps maintain the reliability of your Porsche's electrical system. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Round Connector provides reliable fit, performance, and durability for Porsche maintenance, repairs, and restoration projects.

Maintain the secure fit and sealing performance of your Porsche window aperture seal with this OE Match Retaining Clip, manufactured as a direct replacement. Produced to OE-style specifications, this retaining clip is designed to securely fasten the window aperture seal to the body, ensuring correct alignment and helping to maintain an effective barrier against water, wind, and road noise. It provides the correct fit and retention required for dependable, long-lasting installation.
Sold individually

• Porsche 356A 1955-59
• Porsche 356B 1959-63
• Porsche 356C 1963-65  

• Secures the window aperture seal firmly to the body.
• Maintains the correct alignment of the window seal.
• Helps provide a watertight and weather-resistant seal.
• Reduces the risk of wind noise and water ingress.
• Replaces damaged, corroded, or missing retaining clips.
• Ensures reliable retention of the window seal assembly.
• Provides an OE-style fit for straightforward installation.

• Loose or poorly fitted window aperture seal.
• Broken, missing, or damaged retaining clips.
• Water leaks around the window aperture.
• Increased wind noise while driving.
• Window seal lifting away from the body.
• Corrosion or distortion of the retaining clips.
• Damage identified during window seal replacement or restoration.

• The retaining clip is a small but essential fastening component that keeps the window aperture seal correctly positioned against the bodywork. Without secure clips, the seal may become loose or misaligned, reducing its ability to keep out water, wind, and dirt while affecting the overall appearance and longevity of the sealing system.
• Replacing worn or damaged retaining clips restores the correct installation of the window aperture seal, helping to maintain weather protection, reduce wind noise, and preserve the factory fit and finish of your Porsche. It is a simple yet important repair that supports the long-term performance of the vehicle's body sealing system.

• Porsche 924 2.0L 1976-79
• Porsche 924 2.0L 1980-85
• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94
• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

• Illuminates the passenger compartment.
• Improves visibility when entering or exiting the vehicle.
• Assists occupants in locating controls and personal belongings.
• Provides reliable cabin lighting in low-light conditions.
• Replaces damaged or faulty original interior light units.
• Restores the factory appearance of the interior.
• Provides an OE-style fit and dependable quality.

• Interior light failing to illuminate.
• Flickering or intermittent lighting.
• Cracked or damaged light lens.
• Discoloured or heat-damaged housing.
• Loose or damaged mounting points.
• Corroded electrical contacts.
• Damage identified during interior refurbishment or restoration.

• The interior light is an important convenience and safety feature, providing illumination inside the cabin whenever the doors are opened or when additional lighting is required. A damaged or faulty light unit can reduce interior visibility, making it more difficult to access controls or locate items while also detracting from the vehicle's overall presentation.
• Replacing a worn or damaged interior light restores dependable cabin illumination, improves the appearance of the interior, and helps maintain the original functionality of the lighting system. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Interior Light provides the correct fit, reliable performance, and long-lasting durability, making it an excellent choice for Porsche maintenance, repairs, and restoration projects.

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974 2.7L

• Covers the base of the handbrake lever.
• Conceals the handbrake mechanism for a factory-style appearance.
• Helps protect the mechanism from dirt and debris.
• Restores the original finish of the centre console.
• Replaces cracked, split, or worn original handbrake boots.
• Enhances the overall appearance of the vehicle interior.
• Provides an OE-style fit and dependable quality.

• Cracked or split handbrake boot.
• Faded or worn material.
• Loose or poorly fitting boot sleeve.
• Torn stitching or damaged trim.
• Dirt collecting around the handbrake mechanism.
• Cosmetic deterioration of the centre console.
• Interior restoration requiring replacement trim components.

• The handbrake boot sleeve is an important interior trim component that helps protect the handbrake mechanism while maintaining the clean, finished appearance of the Porsche centre console. A worn or damaged boot can detract from the quality of the interior and allow dust and debris to enter the mechanism, potentially increasing wear over time.
• Replacing a deteriorated handbrake boot sleeve restores the original factory appearance, improves the presentation of the interior, and helps protect the handbrake assembly from contamination. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Handbrake Boot Sleeve provides the correct fit, high-quality finish, and long-lasting durability, making it an excellent choice for Porsche maintenance, repairs, and restoration projects.

Performance Upgrade Chip – Varioram with Standard Flywheel and Clutch for Euro Version (55-Pin DME)

Unlock the full performance potential of your 1995-1998 Porsche 993 Varioram (European specification) with the OE Match Performance Upgrade Chip. Developed exclusively for Euro Varioram models (excluding US specification vehicles) fitted with the 55-pin Bosch Motronic DME 0.261.203.679, this advanced calibration transforms the performance and drivability of Porsche's final air-cooled flat-six.

Fits:

• Porsche 993 (911) C2 1995-97
• Porsche 993 (911) C4 1995-97
• Porsche 993 (911) C2S 1995-97
• Porsche 993 (911) C4S 1995-97

Suitable for manual and Tiptronic transmissions, the OE Match Performance Chip delivers stronger low and mid-range torque, sharper throttle response and smoother power delivery while maintaining factory reliability.

Unlock the Hidden Performance of the Varioram Engine

The Varioram induction system provides excellent flexibility, but the factory Bosch Motronic calibration leaves significant performance untapped. OE Match software has been extensively developed to remove the familiar hesitation below 4,000 rpm, allowing the 3.6-litre engine to produce stronger pulling power from low RPM while delivering noticeably improved throttle response.

Benefits include:

• Increased low and mid-range torque
• Sharper throttle response
• Eliminates the factory sub-4,000 rpm flat spot
• Improved acceleration throughout the rev range
• Dyno-proven horsepower gains
• Smoother, more responsive power delivery

The result is a 993 that feels more eager, more flexible and considerably more enjoyable to drive on both road and track.

Includes the Latest Lightweight Flywheel (LWF) Software

If your vehicle has been fitted with an RS lightweight flywheel and clutch, the latest OE Match software incorporates the advanced Lightweight Flywheel Fix.

This programming:

• Eliminates lightweight flywheel stalling
• Prevents RPM dipping below idle during deceleration and gear changes
• Improves clutch engagement
• Reduces unnecessary clutch slip and wear
• Further enhances throttle response

The software is fully compatible with both standard and lightweight flywheel vehicles, and existing OE Match customers can update earlier chips to the latest LWF coding.

Optional Immobiliser / Driveblock Delete

This calibration can also be supplied with the Immobiliser / Driveblock function disabled for vehicles equipped with Porsche's factory Driveblock system.

Removing the Driveblock function eliminates the need to deactivate the immobiliser with the key fob before every journey, restoring the operation of the vehicle to that of a factory non-Driveblock model.

To complete the conversion, install jumper relay 96461018400 into relay position R61, exactly as Porsche specified for non-Driveblock vehicles.

Ordering Information

This calibration is suitable for:

• 1995-1998 Porsche 993 Varioram (European specification only)
• Bosch Motronic DME 0.261.203.679
• 55-pin DME connector
• Manual transmission or Tiptronic transmission

Before ordering, confirm the Bosch DME number printed on the Motronic label located on the DME beneath the left-hand front seat to ensure compatibility.

Why Choose OE Match?

Unlike generic replacement chips, every OE Match calibration has been extensively refined through dyno development and real-world road testing to deliver maximum performance while maintaining factory reliability.

The software is designed for 95 RON premium fuel as standard, with an optional 98 RON performance calibration available for owners regularly using higher-octane fuel. Every chip is engineered not to trigger the Check Engine Light and is backed by a 100% satisfaction guarantee.

Benefits

Increased horsepower and torque Sharper throttle response Eliminates the factory sub-4,000 rpm hesitation Improved low and mid-range acceleration Supports lightweight flywheel conversions Optional Driveblock removal Improved everyday drivability 100% satisfaction guarantee

Porsche 993 Varioram Performance Chips & Bosch Motronic ECU Upgrades

OE Match Performance Chips are specifically developed for 1995-1998 European Porsche 993 Varioram models equipped with the 55-pin Bosch Motronic DME 0.261.203.678. By optimising ignition timing, fuel delivery and throttle response, these calibrations unlock the full performance potential of the Varioram induction system while maintaining factory refinement and reliability.

Performance Upgrade Chip – Varioram Euro with Lightweight Flywheel & Clutch for Euro Version (55-Pin DME)

Unleash the full performance potential of your 1995-1998 Porsche 993 Varioram (European specification) with the OE Match Performance Upgrade Chip, developed specifically for Driveblock-equipped vehicles fitted with an RS lightweight flywheel and clutch assembly. Designed exclusively for Euro-specification Varioram models (excluding US vehicles) using the 55-pin Bosch Motronic DME 0.261.203.679, this advanced calibration transforms the performance, drivability and responsiveness of Porsche's legendary air-cooled 3.6-litre flat-six.

Fits:

• Porsche 993 (911) C2 1995-97
• Porsche 993 (911) C4 1995-97
• Porsche 993 (911) C2S 1995-97
• Porsche 993 (911) C4S 1995-97

Suitable for both manual and Tiptronic transmissions, the OE Match Performance Chip delivers stronger low and mid-range torque, sharper throttle response and significantly improved acceleration while incorporating the latest Lightweight Flywheel (LWF) software.

Specifically Engineered for Lightweight Flywheel Conversions

A lightweight flywheel allows the engine to rev faster and respond more eagerly, but many conversions suffer from unstable idle, RPM dip and stalling during deceleration or when pulling away.

OE Match has developed one of the most advanced Lightweight Flywheel software solutions available to eliminate these common drivability issues while enhancing the benefits of the lighter rotating assembly.

The latest LWF calibration:

• Eliminates lightweight flywheel stalling
• Prevents RPM dropping below idle during deceleration and gear changes
• Improves clutch engagement from standstill
• Reduces unnecessary clutch slip, helping minimise clutch wear
• Maximises the sharper throttle response and faster engine acceleration provided by the lightweight flywheel

Former OE Match customers are welcome to have their chips updated free of charge to the latest Lightweight Flywheel coding.

Unlock the Hidden Performance of the Varioram Engine

The Porsche Varioram induction system already provides exceptional flexibility, but the factory Bosch Motronic calibration leaves noticeable performance untapped.

OE Match software removes the familiar hesitation below 4,000 rpm, allowing the engine to produce substantially stronger low and mid-range torque while delivering immediate throttle response throughout the rev range.

Performance benefits include:

• Increased horsepower and torque
• Sharper throttle response
• Eliminates the factory sub-4,000 rpm flat spot
• Improved acceleration throughout the rev range
• Faster engine response
• Smoother and more progressive power delivery

The result is a 993 that feels significantly more responsive and rewarding to drive in every situation.

Optional Immobiliser / Driveblock Delete

This chip can also be supplied with the Immobiliser / Driveblock function disabled for vehicles originally equipped with Porsche's factory Driveblock system.

Removing the Driveblock function eliminates the need to deactivate the immobiliser using the key fob before every journey, returning the vehicle to the operation of a factory non-Driveblock model.

To complete the conversion, install jumper relay 964.610.184.00 into relay position R61, exactly as Porsche specified.

Premium Fuel Calibration

Every OE Match Performance Chip is calibrated for 91 AKI (95 RON) premium unleaded fuel as standard.

For owners regularly using 93 AKI (98 RON) premium fuel, an alternative 98 RON calibration can be supplied. Simply select your preferred fuel grade when placing your order.

Unlike many generic performance chips, OE Match software is carefully developed to deliver enhanced performance without triggering the Check Engine Light.

Ordering Information

This calibration is compatible with:

• Porsche 993 Varioram (1995-1998 European specification)
• Bosch Motronic DME 0.261.203.679
• 55-pin DME connector Manual transmission
  
• Tiptronic transmission RS lightweight flywheel and clutch conversions

Before ordering, verify the Bosch DME number printed on the Motronic label located on the DME beneath the left-hand front seat.

Why Choose OE Match?

Every OE Match Performance Chip is developed through extensive dyno testing and real-world road evaluation to deliver maximum performance while maintaining factory reliability.

Each calibration is tailored to the exact vehicle specification, optimised for lightweight flywheel conversions and engineered for premium fuel

Benefits

• Increased horsepower and torque
• Sharper throttle response
• Eliminates the factory sub-4,000 rpm lag
• Eliminates lightweight flywheel stalling
• Improved clutch engagement and drivability
• Faster engine response
• Reduced clutch wear
• Optional Driveblock removal
• Factory-quality reliability

Porsche 993 Varioram Performance Chips for Lightweight Flywheel Conversions

OE Match Performance Chips are engineered specifically for 1995-1998 Porsche 993 Varioram Euro models fitted with an RS lightweight flywheel and clutch assembly. By recalibrating the Bosch Motronic ECU and incorporating the latest Lightweight Flywheel software, these calibrations eliminate the common drivability issues associated with lightweight flywheel conversions while delivering stronger torque, faster throttle response and increased horsepower.

Design911 supplies vehicle-specific OE Match Performance Chips for manual and Tiptronic transmissions, with support for optional Driveblock removal, premium fuel calibrations and Bosch DME-specific programming. Every chip is carefully matched to the correct ECU to ensure maximum compatibility, reliability and performance