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OE Match
Performance Upgrade Chip with Premuffler / Cat Bypass
Unlock the full performance of your 1989-1994 Porsche 964
Carrera 2 or Carrera 4 with the OE Match Performance Upgrade Chip. Designed
specifically for cars fitted with a premuffler, catalytic converter bypass
or sports catalytic converter, together with either the factory rear
silencers, a muffler bypass or a sports muffler.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Suitable for manual and Tiptronic models, this calibration also supports vehicles fitted with an RS lightweight flywheel, with the latest LWF software fix included as standard.
Optimised for Modified Exhaust Systems
Removing the restrictive factory catalytic converter
improves exhaust flow, but the Bosch Motronic ECU requires recalibration to
fully exploit the increased airflow. OE Match software provides the additional
fuel and optimised ignition timing needed to maximise performance while
maintaining safe air-fuel ratios and preventing excessive knock sensor
intervention.
The result is:
- Stronger low and mid-range torque
- Sharper throttle response
- Elimination of the factory flat spot below 4,000 rpm
- Smoother idle
- Dyno-proven horsepower gains
- Improved everyday drivability
Your 964 feels lighter, more responsive and pulls hard from
low engine speeds, making both road driving and track use considerably more
rewarding.
Dyno Developed for Real-World Driving
Unlike generic replacement chips, OE Match calibrations are
written specifically for each engine and exhaust configuration.
Every program has been extensively developed through
hundreds of hours of dyno tuning, road evaluation and real-world testing using
everyday pump fuel. Ignition timing, fuel delivery and throttle mapping have
all been optimised to deliver:
- Smoother idle
- Increased low and mid-range torque
- Sharper throttle response
- Elimination of the factory sub-4,000 rpm flat spot
- Stronger acceleration throughout the rev range
- Dyno-proven horsepower gains
- Improved everyday drivability
Unlike inferior calibrations, OE Match software maintains safe air-fuel ratios, ensuring the engine continues to run efficiently while avoiding the lean conditions that can reduce performance and increase knock sensor activity.
Includes the Lightweight Flywheel (LWF) Fix
Every calibration includes the latest Lightweight Flywheel Fix, eliminating the stalling and RPM dip commonly experienced after fitting an RS lightweight flywheel and clutch. The software also improves clutch engagement and throttle response while remaining fully compatible with standard flywheel vehicles.
Developed Specifically for Your 964
Unlike generic performance chips, every OE Match calibration has been developed through extensive dyno testing and real-world road evaluation using premium pump fuel. Each program is written specifically for your engine and exhaust configuration, delivering maximum performance without triggering the Check Engine Light.
Suitable for:
- Porsche 964 Carrera 2 & Carrera 4 Manual or Tiptronic transmission
- Premuffler Cat bypass pipe
- Sports catalytic converter
- Factory, sports or bypass rear silencers
- Factory
or RS lightweight flywheel
Benefits
- Increased horsepower and torque
- Sharper throttle response
- Eliminates the factory sub-4,000 rpm hesitation
- Improved acceleration throughout the rev range
- Smoother idle
- Eliminates lightweight flywheel stalling
- Better everyday drivability
- Dyno-developed Bosch Motronic calibration
- Will not trigger the Check Engine Light
Porsche 964 Premuffler & Cat Bypass Performance Chips
OE Match Performance Chips are specifically developed for Porsche 964 models fitted with freer-flowing exhaust systems. By recalibrating the Bosch Motronic ECU to suit premufflers, cat bypass pipes or sports catalytic converters, the engine delivers stronger torque, improved throttle response and smoother power delivery while maintaining safe engine operation.
Whether your 964 is fitted with a standard or lightweight flywheel, manual or Tiptronic transmission, Design911 offers model-specific OE Match calibrations engineered to maximise performance and reliability.
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Shop Securely
12 Month Warranty
Worldwide Delivery
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
0.261.203.678, 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 0.261.203.678
- 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.
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Shop Securely
12 Month Warranty
Worldwide Delivery
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, engineered specifically for cars 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 0.261.203.678, this advanced calibration transforms the performance, drivability and responsiveness of Porsche's legendary 3.6-litre 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 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
An RS 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 0.261.203.678
- 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
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Shop Securely
12 Month Warranty
Worldwide Delivery
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
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Shop Securely
12 Month Warranty
Worldwide Delivery
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Saturday: Closed
Sunday: Closed