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Porsche > 996 (911) (1997-2005) > 996 GT3 MKI 1999-02 > Engine Tuning >

Exhaust Packages

Exhaust Packages

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DISPLAYING 1 to 3 (of 3 products)
DesignTek Sports Exhaust Package (+15 to 20bhp) Porsche 996 GT3 - 3606309602, 99611112108
1
DesignTek Sports Exhaust Package (+15 to 20bhp) Porsche 996 GT3
EXHAUSTKIT39
Product Information
Product Information
Sports Cat Bypass + Headers Package (+15 to 20bhp)

designtek

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Related, superseded, cross reference or alternative numbers for comparison.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
3606309602
99611112108

The product you are viewing cross references to these numbers
DesignTek Sports Exhaust Package (+16 to 22bhp) Porsche 996 GT3 - 3606309602, 99622096300SGT3
1
DesignTek Sports Exhaust Package (+16 to 22bhp) Porsche 996 GT3
EXHAUSTKIT40
Product Information
Product Information
Sports Exhaust + Headers Package (+16 to 22bhp)

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Related, superseded, cross reference or alternative numbers for comparison.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
3606309602
99622096300SGT3

The product you are viewing cross references to these numbers
DesignTek Sports Exhaust Package Porsche 996 C2 / C4 / C4S - 3606009602, 3606109963, 99611112257, 99611113254, 99611198404, 99611113274, 99611113275, 99611113270, 99611198405, 99611113168, 99611198504, 99611113174, 99611113175, 99611113170, 99611198505, 99611112157, 99611113154, 99611111350, 99906402601, 90007428702, 90008308000, 90012305020, N0138322, 99908405202, 99711152000, 99611110800, 90037818301, 90037810501, 90038000501
1
DesignTek Sports Exhaust Package Porsche 996 C2 / C4 / C4S
EXHAUSTKIT34
Product Information
Product Information
Sports Exhaust + 200 Cell X-Pipe Ø55mm Sports Cats Package

designtek

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
3606009602
3606109963
99611112257
99611113254
99611198404
99611113274
99611113275
99611113270
99611198405
99611113168
99611198504
99611113174
99611113175
99611113170
99611198505
99611112157
99611113154
99611111350
99906402601
90007428702
90008308000
90012305020
N0138322
99908405202
99711152000
99611110800
90037818301
90037810501
90038000501

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
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About Exhaust Packages

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       

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