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Porsche Engine Tuning Parts for Classic and Modern Models
Unlock additional performance, responsiveness, and reliability with high-quality Porsche engine tuning parts from Design911. Our extensive range of Porsche engine performance parts includes ECU upgrades, Porsche IMS bearings, engine rods, radiators, air filters, clutches, turbochargers, supercharger kits, valve springs, power kits, distributors, and supporting performance components.
CSF has decades of experience designing and manufacturing A/C Condensers, and has once again applied modern design and manufacturing techniques to these classic Porsche platforms. The result is a condenser that fits perfectly, outperforms the factory system by a significant margin, and costs less than a new OEM unit.
SET OF 2
Fits:
Porsche 996 911 (Carrera, 4, 4S, Targa, & GT3) 1999-2005
Porsche 986 Boxster (Base, S, Roadster, & Roadster S) 1997-2005
OEM Part Numbers: 9975739101, 99657311100
The CSF 996/986 Condenser utilizes a modern parallel-flow core design similar to the original OE unit. However, the CSF 18mm 8-channel microtube core offers better flow and more surface area contact for superior heat transfer. The 8mm tall multi-louvered fins further improve heat transfer over the basic fin design of the OE unit. Together, these features offer better heat dissipation for the refrigerant while increasing airflow to the radiators behind them.
Key Differences and Improvements:
• Increased performance: Approximately 5% better performance than a brand-new OEM condenser and much larger improvement over a clogged or dirty unit that has been installed for some time.
• More airflow to the radiator behind the condenser for better engine cooling performance
• Improved Durability: More robust design and construction materials
• Less Expensive: Around half the price of a new Genuine Porsche unit
Why Upgrade?
Whether you are restoring a 996 or 986 to show-car condition or upgrading your weekend toy for more comfort, CSF’s OEM+/Performance A/C Condenser is a no-brainer. It is a straight forward plug-and-play installation, more efficient, and built to last.
Porsche 996 / 986 OEM+ Performance A/C Condenser Features
• Made with a Dual Pass Cross Flow CSF A/C Parallel Condenser Core
• Super-High Pressure 18mm 8-Channel Microtube for Optimal Flow and Maximum Surface Area Contact
• 26 Rows of Cooling Tubes and paired with 27 Rows of 8mm Tall Multi-Louvered Fins
• Laser Cut Mounting Brackets and OEM Style Block Fitting Connector
• 100% All Aluminum Construction
• Satin Black Finish
• True Plug-and-Play “Drop-in Fit” Installation Requires Absolutely No Modifications
• Individually Leak and Pressure Tested
• 2-Year Limited Warranty
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
8381KIT
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
CSF Complete Performance Radiator Kit – Left, Right and Centre
This complete high-performance cooling kit from CSF provides
a full radiator replacement solution for Porsche 996 Carrera 2 and
Carrera 4 Tiptronic (excluding C4S), the GT3 / GT3 RS and 986 Boxster S models. Designed as a direct OE replacement with
motorsport-grade durability, the kit includes all three radiators along with
essential installation components.
Fits:
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
This makes it an ideal upgrade for ageing cooling systems or for drivers who want improved cooling performance and long-term reliability.
Kit Contents
• Left radiator
• Right radiator
• Centre radiator
• Radiator hoses
• Hose clips
• Radiator mounting buffers
• Blanking caps
This comprehensive kit allows you to replace the entire radiator system in one installation, ensuring optimal cooling performance and reducing the risk of future leaks or component failures.
Cross Reference Numbers
• LEFT: 99610613151 / 99610613181
• RIGHT: 99610613251 / 99610613282
• CENTRE: 99610603751 / 99610603752 / 99610603752
What This Radiator Kit Does
The Porsche 996 cooling system relies on three front-mounted radiators to dissipate heat from the engine coolant. These radiators maintain stable engine operating temperatures by transferring heat away from the coolant through airflow across the radiator core.
A properly functioning radiator system helps:
• Prevent engine overheating
• Maintain optimal engine performance
• Protect cylinder heads and gaskets
• Improve cooling during heavy traffic or hot weather
• Support track and performance driving conditions
Why Porsche 996 Radiators Fail
Over time, original radiators can suffer from:
- Road debris damage
- Corrosion and coolant contamination
- Plastic end tank fatigue
- Blocked cooling cores
Replacing all three radiators together ensures balanced cooling performance and prevents repeated labour costs.
Why Upgrade to CSF Performance Radiators?
All-Aluminium Motorsport Construction
CSF radiators are engineered using full aluminium construction with precision
welding and reinforced joints, improving strength and durability compared with
standard replacements.
High Efficiency Core Design
The advanced 2-row core with CSF B-Tube technology increases cooling capacity
by approximately 20 percent compared with conventional radiator tube designs.
True Drop-In Installation
Designed as OE-specific replacements with correct mounting points and
quick-connect inlet and outlet pipes for easy installation without
modification.
Track-Tested Reliability
These radiators have been tested under extreme conditions, including high
ambient temperatures and track environments.
Engineering Highlights
• B-Tube technology for maximum heat transfer efficiency
• High efficiency louvered fin design
• OE radial and deep drawn aluminium end tanks
• Wind tunnel tested core for optimal airflow cooling
• Reinforced mounting design for fan shrouds and condensers
• CNC machined brackets and fittings
• Racing style all aluminium drain plug
• Direct OE fitment requiring no modifications
Manufacturing Quality
• Brazed in CAB furnace for strength and consistency
• ISO 9001 / ISO 9002 certified production
• Dedicated in-house tooling and engineering facilities
• Master-class TIG welding for precision joints
Testing and Quality Control
• Individual leak testing
• Vibration cycle testing
• Thermal cycle testing
• Burst pressure testing repeated 10,000 times
• Salt spray corrosion resistance testing
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
7044KIT.2
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Racing and high performance radiators for all Porsche models make a great performance upgrade as well as an incredibly durable and reliable OE replacement.
SET OF 2, for Left and Right side.
Fits:
Porsche 996 C2
Porsche 996 C4
Porsche 996 GT3 1997-05
Porsche 986 Boxster 1997-2004
Cross reference numbers:
• LEFT: 8MK376714291 / 99610613151 / 99610613181
• RIGHT: 8MK376713791 / 99610613251 / 99610613282
CSF strives to build and engineer the most advanced, efficient, and reliable cooling systems in the world. All-aluminium 100% TIG welded, CNC machined brackets, mounting pins and "Quick-Connect" inlet/outlet pipes, Drop-in fit requiring no modifications , 2 row core with B-Tube technology (+20%), 1 hour hand polished, Track Tested & Proven in 110°F, ISO 9001 certified cooling system manufacture.
ENGINEERING
• "B-Tube" Technology - Most efficient tube in the world
• High Efficiency Louvered Fin
• OE radial and deep drawn aluminium end tanks
• Wind tunnel tested for optimal radiator core cooling performance
• Stronger joint design for mountings, fan shrouds & condensers
• OE Specific Mounting
• "Drop-in" fitment requiring no modifications
• CNC Machined brackets and fittings
• Racing Style all-aluminium drain plug
MANUFACTURING
• Brazed in CAB Furnace
• ISO 9001/9002 certification
• Privately owned factories with full "In house" tool rooms
• "Master Class" TIG welding
TESTING
• Individually leak tested
• Vibration cycle tested
• Thermal cycle tested
• Burst pressure cycle tested 10,000 times for strength
• Salt spray tested for corrosion protection
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
7044KIT
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Racing & high performance radiators for all Porsche models. CSF strives to build and engineer the most advanced, efficient, and reliable cooling systems in the world. All-aluminium 100% TIG welded, CNC machined brackets, mounting pins and "Quick-Connect" inlet/outlet pipes, Drop-in fit requiring no modifications, 2 row core with B-Tube technology (+20%), 1 hour hand polished, Track Tested & Proven in 110°F, ISO 9001 certified cooling system manufacture.
ENGINEERING
"B-Tube" Technology - Most efficient tube in the world
High Efficiency Louvered Fin
OE radial and deep drawn aluminium end tanks
Wind tunnel tested for optimal radiator core cooling performance
Stronger joint design for mountings, fan shrouds & condensers
OE Specific Mounting
"Drop-in" fitment requiring no modifications
CNC Machined brackets and fittings
Racing Style all-aluminium drain plug
MANUFACTURING
Brazed in CAB Furnace
ISO 9001/9002 certification
Privately owned factories with full "In house" tool rooms
"Master Class" TIG welding
TESTING
Individually leak tested
Vibration cycle tested
Thermal cycle tested
Burst pressure cycle tested 10,000 times for strength
Salt spray tested for corrosion protection
Cross reference numbers
Left: 8MK376714291 = 99610613151
Right: 8MK376713791 = 99610613251
Centre: 8MK376716651 , 99610603751, 99610603750,
Fits:
Porsche 996 C2
Porsche 996 C4
Porsche 996 GT3 1997-05
Porsche 986 Boxster S
Porsche 986 Boxster Tiptronic
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
RADKIT99603.CSF
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Porsche Engine Tuning & Performance Parts
At Design911, we offer one of the widest selections of Porsche performance and tuning parts available online. Whether you’re chasing more horsepower, sharper throttle response, or a sportier exhaust note, our catalogue includes everything from ECU remapping equipment and electronic throttle bodies to air induction kits, turbochargers, exhaust packages, and supercharger kits.
We source only the highest quality performance parts from leading global manufacturers, delivering worldwide from our UK base. From classic air-cooled icons to the latest turbocharged models, we have performance upgrades tailored to your Porsche.
What Porsche Performance Parts Do We Offer?
Our range covers every area of engine tuning and
performance:
- ECU
Remapping Equipment – unlock hidden power and refine engine management
- Electronic
Throttle Bodies – faster response and smoother power delivery
- Air
Induction Kits – improve airflow for extra performance and a sportier
engine sound
- Turbochargers
& Superchargers – serious horsepower upgrades with proven
reliability
- Exhaust
Packages – enhance performance and unleash the true Porsche sound
- Safety Upgrades – fire extinguisher mounts and track-ready accessories
Our website makes it easy to filter results by Porsche model and year, ensuring you only see parts that fit your car.
Why Maintain Performance Parts?
Like all engine components, performance parts need regular
inspection:
- Visual
checks every few months for signs of wear, damage, or leaks
- Listen for changes in exhaust tone, turbo sounds, or throttle response — unusual noises can indicate the need for servicing or replacement
Catching issues early prevents failures on the road and ensures your Porsche always delivers its best performance.
Benefits of Porsche Performance Parts
- Increased
Horsepower & Torque – induction kits, turbo upgrades, and ECU
remaps combine to deliver noticeable gains
- Improved
Throttle Response – quicker reaction and sharper acceleration
- Enhanced
Sound – sport exhausts transform your Porsche’s character with a
motorsport-inspired tone
- Track-Day
Ready Safety – from kill switches to fire extinguisher mounts, safety
parts protect both driver and car
- Driving Enjoyment – tuning parts don’t just add numbers; they make your Porsche more engaging, responsive, and thrilling to drive
Why Choose Design911 for Porsche Tuning?
- Massive
Range – from small upgrades to full turbo kits
- Top
Brands – trusted global manufacturers and Porsche-specific specialists
- OEM
& Performance Options – choose between factory upgrades or
high-output tuning parts
- Worldwide
Delivery – fast, secure shipping from our UK warehouse
- Expert Advice – our team can help you select the best parts for your goals
Explore our Porsche Engine Tuning range today – from ECU remaps to complete turbocharger kits – and unlock the true performance potential of your Porsche.
Buy Porsche Engine Tuning Parts with Confidence: Trusted by Porsche Owners
Porsche owners rely on Design911 for high-quality Porsche Engine Tuning Parts, supported by decades of specialist expertise. ECU remaps, induction kits & throttle bodies, our team ensures accurate part selection and reliable fitment. Discover why thousands of Porsche enthusiasts rate Design911 as “Excellent” on Trustpilot, trusting us to maintain performance, sound, and reliability across classic and modern Porsche models.
Porsche Engine Performance Parts, Induction Systems and Power Upgrades
Performance tuning involves optimising airflow, fuel delivery, ignition, cooling, and drivetrain systems to achieve balanced and reliable power gains. Design911 offers a comprehensive range of Porsche engine performance parts, allowing owners to upgrade individual components or build complete performance packages.
Airflow improvements begin with Porsche performance air filters, intake upgrades and performance air induction kits, helping engines breathe more efficiently while improving throttle response. Additional upgrades such as performance plenums and intake upgrades, high-flow Y-pipes, and direct-to-head throttle bodies can further increase airflow and engine responsiveness.
Electronic tuning solutions, including ECU remapping systems, electronic throttle boosters, and ECU readers and fault finders, help optimise calibration, monitor engine health, and extract additional performance from factory systems.
Ignition performance can be enhanced through iridium power spark plugs, iridium racing spark plugs, and plasma direct coils, providing more consistent combustion under high-load conditions.
For complete engine builds and strengthening projects, Design911 stocks Porsche IMS bearings, Porsche engine rods and bolts, Wössner forged piston kits, Wössner steel connecting rods, CP-Carrillo pistons, CP-Carrillo connecting rods, Capricorn Automotive performance engine parts, and Retro Performance pistons and cylinders.
Forced induction upgrades include Porsche turbochargers, diverter valves, performance intercoolers, and complete supercharger kits, allowing significant increases in power when paired with supporting intake, fuelling, and ECU modifications.
Why Buy Engine Tuning Parts from Design911
- Specialist Expertise: Over 25 years of experience supplying Porsche engine performance parts, tuning upgrades, and engine rebuild components with expert fitment guidance.
- Extensive Stock: Access everything from Porsche radiators, Porsche air filters, Porsche clutches, and Porsche turbochargers through to forged internals, supercharger systems, and complete power upgrade packages.
- Dedicated Support: A knowledgeable team providing fast assistance by phone or email.
- Free UK Delivery: Free delivery on orders over £200, with worldwide shipping including Europe and beyond.
- Trusted by Porsche Owners: Over 110,000 Porsche enthusiasts trust Design911. View Trustpilot reviews.
Order your Porsche Engine Tuning Parts today or contact us for personalised advice.
Engine Performance Parts for All Models
Whatever Porsche model you drive, Design911 stocks engine tuning and performance components tailored to your vehicle, including:
- Porsche 911 (Classic, 964, 993, 996, 997, 991 and 992)
- Porsche Boxster (986, 987, 981 and 718)
- Porsche Cayman (987, 981 and 718)
- Porsche Cayenne
- Porsche Macan
- Porsche Panamera
- Porsche Taycan
- Porsche 924, 928, 944 and 968
Whether you are installing a simple induction upgrade, replacing worn engine components, or building a high-performance engine, our model-specific catalogue helps ensure accurate fitment and compatibility.
Engine Fitment, System Compatibility and Performance Reliability
Correct fitment is essential when modifying engine systems. Every performance component supplied by Design911 is selected to integrate correctly with factory specifications while supporting increased performance demands.
Matched to Original Porsche Engineering Standards
Many Porsche performance upgrades are designed around factory mounting points, tolerances, and system requirements. This helps maintain reliability while improving performance characteristics.
Designed for Complete Engine System Integration
Engine tuning components often work best when installed as part of a complete package. Key systems include:
- Air filters, induction kits, plenums and throttle bodies
- Fuel rails, regulators and ECU calibration systems
- Turbochargers, intercoolers and diverter valves
- Clutches, flywheels and drivetrain components
- Cooling systems including radiators, thermostats and silicone hoses
- Internal engine components such as rods, pistons, crankshafts and valve springs
Managing Heat, Stress and Long-Term Reliability
Higher performance outputs place greater demands on engine systems. Upgrades such as performance radiators, thermostats, silicone hose kits, and oil flow and sump components help control temperatures and protect critical engine components under demanding conditions, supporting intake, fuelling, and ECU modifications.
Porsche Engine Tuning Component Maintenance and Longevity
Performance components experience wear due to heat cycles, vibration, increased cylinder pressures, and regular usage. Routine inspection and preventative maintenance help maximise performance and reliability.
| Component | Typical Service or Inspection Interval | Common Signs of Wear |
|---|---|---|
| Air Filters | Inspect every 10,000-20,000 miles | Restricted airflow, contamination |
| Spark Plugs | Inspect every 20,000-40,000 miles | Misfires, poor combustion |
| Ignition Coils | Inspect every 40,000-60,000 miles | Hesitation, rough running |
| Clutches | Inspect every 40,000-80,000 miles | Slipping, vibration |
| Radiators | Inspect every 5 years | Corrosion, leaks, reduced cooling |
| Intercoolers | Inspect every 5 years | Damage, airflow restrictions |
| Turbochargers | Inspect every 60,000-100,000 miles | Oil leaks, boost loss |
| IMS Bearings | Inspect during clutch replacement | Bearing wear, abnormal noise |
| Valve Springs | Inspect during engine rebuilds | Valve float, performance loss |
| Engine Mounts | Inspect every 50,000-80,000 miles | Excessive engine movement |
| Fuel Rails & Regulators | Inspect every 60,000 miles | Fuel pressure irregularities |
| Crankshafts & Rods | Inspect during rebuilds | Fatigue, wear, vibration |
Reliability and Performance Upgrade Advice
Performance upgrades deliver the best results when they are approached as part of a balanced package rather than isolated modifications. Improving airflow, fuelling, cooling, and engine strength together helps maximise gains while maintaining reliability.
Benefits of Preventative Performance Upgrades
- Improved Power Delivery: Upgraded intake systems, turbochargers, plenums, throttle bodies, and ECU calibrations can improve horsepower, torque, and throttle response.
- Enhanced Reliability: Components such as Porsche IMS bearings, reinforced rods, upgraded cooling systems, and strengthened valve train components help reduce known weaknesses and support higher performance levels.
- Improved Cooling Efficiency: Performance radiators, intercoolers, thermostats, and oil management upgrades help maintain stable operating temperatures.
- Greater Drivetrain Durability: Upgraded clutches and supporting drivetrain components ensure power is transferred effectively while reducing wear.
- Optimised Engine Efficiency: Airflow, ignition, and fuelling upgrades work together to improve combustion efficiency and overall responsiveness.
- Support for Road and Track Applications: Whether preparing a Porsche for spirited road driving, track days, or motorsport use, performance tuning parts allow owners to tailor vehicles to their specific requirements.
Design911 supports Porsche owners, enthusiasts, restorers, and professional workshops with a comprehensive range of Porsche engine tuning parts, Porsche engine performance parts, Porsche turbochargers, Porsche air filters, Porsche radiators, Porsche clutches, Porsche power kits, Porsche distributors, Porsche engine rods, Porsche valve springs, and Porsche IMS bearings.
With Genuine Porsche, OEM-approved, and specialist performance components available for classic and modern models, every project can benefit from reliable fitment, proven engineering, and long-term performance.
OE vs OEM Porsche Service Parts Explained
Watch this video to understand the key differences between OE (Original Equipment) and OEM (Original Equipment Manufacturer) Porsche parts. It breaks down how Porsche service components are produced, what makes them different, and how you can choose the right option without compromising on quality or reliability. The comparison includes common service items such as spark plugs, brake components, and lighting parts to help you make more informed maintenance decisions.
Play Video
Porsche Engine Tuning Parts FAQs
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