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- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>

DesignTek 996 Performance exhaust package. High Grade stainless steel exhaust system for Porsche 996 GT3
Made from 14 - 16 gauge T304 stainless steel.
Includes Sports Cat Bypass and Equal length sports headers giving your car a really feel and superb sports car sound.
*Please note Cat bypass systems may not be emissions legal in all counties
NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.
If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
EXHAUSTKIT39
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
DesignTek 996 Performance exhaust package. High Grade stainless steel exhaust system for Porsche 996 GT3
Made from 14 - 16 gauge T304 stainless steel.
Includes Sports mufflers, Equal length sports headers Giving +16 to +22 bhp that you can really feel and superb sports car sound.
*Please note this system can be fitting with factory or sports after market cats
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
EXHAUSTKIT40
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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 C4S 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>

DesignTek 996 Stage 1 Performance package. High Grade stainless steel exhaust system for Porsche 996 1998-2004. 14 - 16 gauge T304 stainless steel.
Includes sports mufflers, 200 cell sports cats giving that you can really feel and superb sports car sound.
Fitting clamps in the images are not included
PLEASE NOTE THESE CATS MAY REQUIRE A REMAP TO ENSURE NO DASHBOARD LIGHTS - Please contact us regarding this!
NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.
If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
EXHAUSTKIT34
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
-
crankcase left 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 101-05
-
oil pump 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 104-00
-
exhaust system 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 202-00
-
brake master cylinder, brake booster, pre-charge pump 996 GT3-1 1999-05 604-00
-
pedals 996 GT3-1 1999-05 702-00
-
battery, power distributor, starter, generator, battery main switch for 996 GT3-1 1999-05 902-05
Porsche Performance Exhaust Packages - Power, Sound & Flow Upgrades
Exhaust Packages are complete performance exhaust solutions designed to improve exhaust gas flow, enhance engine efficiency, and transform the sound of your Porsche. By upgrading restrictive factory components with high-flow systems, exhaust packages help reduce backpressure, improve throttle response, and unlock additional performance—especially in tuned or performance-driven engines.
Available from Design911, Porsche exhaust packages combine precision-engineered components such as headers, sports catalysts, silencers, and tailpipes to deliver a balanced upgrade in power, sound, and durability.
What Do Exhaust Packages Do?
Exhaust packages manage the efficient removal of exhaust gases from the engine.
Core Functions:
- Reduce exhaust backpressure for improved engine breathing.
- Enhance power delivery and throttle response.
- Improve exhaust sound and tone.
- Optimise exhaust flow across the RPM range.
- Support tuning and performance modifications.
Efficient exhaust flow is essential for maximising engine performance and responsiveness.
Why Do Standard Exhaust Systems Fail?
Factory exhaust systems are designed for noise control,
emissions, and cost, which can lead to performance and durability limitations.
Common issues include:
- Restrictive pipework limiting airflow.
- Internal corrosion from heat and moisture.
- Catalyst degradation over time.
- Excessive weight reducing performance efficiency.
- Incompatibility with performance tuning upgrades.
Failing exhaust components can cause power loss, rattles, leaks, and reduced engine efficiency.
Why Upgrade to a Performance Exhaust Package?
Performance exhaust packages are engineered to improve flow, sound, and reliability.
Upgrade Benefits:
- Increased power and improved throttle response.
- Reduced system weight for better performance.
- Enhanced exhaust sound without excessive drone.
- Improved durability using stainless steel or motorsport materials.
- Ideal foundation for further engine tuning.
Upgrading the exhaust system unlocks performance potential while enhancing driving enjoyment.
Highlights
- Porsche performance exhaust package upgrades
- Improved exhaust flow and power delivery
- Enhanced sound quality and tone
- Designed for tuned and performance engines
- High-quality materials for long-term durability