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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram

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DISPLAYING 1 to 10 (of 10 products)
EXHAUSTKIT26
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 +15 to +20 bhp that you can really feel and superb sports car sound.

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Related, superseded, cross reference or alternative numbers for comparison.

EXHAUSTKIT26
3606309601
3606209961

The product you are viewing cross references to these numbers
EXHAUSTKIT27
Product Information
Product Information
Sports Exhaust + Cat bypass Package with fittings.

designtek

DesignTek 996 Performance exhaust package. High Grade stainless steel exhaust system for Porsche 996 1998-2004.
Made from 14 - 16 gauge T304 stainless steel.

Includes Sports Exhaust and Sports Cat bypass pipes, really feel and superb sports car sound.

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.

EXHAUSTKIT27
3606009602
3606309601
3606209961
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
EXHAUSTKIT28
Product Information
Product Information
Sports Exhaust VALVETROINC + X-Pipe Design 200 Cell Sports Cats Package

designtek

DesignTek Valvetronic sports exhaust system. Made from high quality 14-16 gauge T304 stainless steel, hydro-formed muffler cases, radiuses stressed relieved with 2000 degree ceramic fiber and stainless steel wool packed free flow mufflers.

DesignTek sports racing catalytic converters give a HORSEPOWER and TORQUE gain to all 996 cars. High Quality T304 SS C.N.C. mandrel bent tubing for maximum exhaust flow.

The X-Pipe design has increased deeper sound with increased BHP. German imported 200 cell high-flow sport catalytic converters for reduced back pressure and less restriction.

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.

EXHAUSTKIT28
3606109963
3606009614
FITTINGKIT27
96300KIT

The product you are viewing cross references to these numbers
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
POWERKIT9961
Product Information
Product Information
Exhaust Package + Plenum 82mm Throttle Body + Induction Kit Porsche 996 C2 / C4 / C4S

Kit Includes
- Air Induction Kit
- Plenum by IPD
- Throttle Body 82mm
- Exhaust Cat back
- Sports Cats 200 cell
- Sports Headers
- Gaskets & Clamps

BIG BORE Stage 2 Performance exhaust package. High Grade stainless steel exhaust system for Porsche 996. 14 - 16 gauge T304.

For the ultimate performance gains we recommend this set is fitted with an ECU remap giving BHP and Torque that you can really feel and superb sports car sound.

Note: The Plenum is only for CARS WITH "ELECTRONIC ACCELERATOR (M620)" NOT FOR EARLY 996 CABLE THROTTLE CARS

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.

POWERKIT9961
97182
57-7000
3606009602
3606309601
3606109961
99611112257
99611113254
99611198404
99611113274
99611113275
99611113270
99611198405
99611113168
99611198504
99611113174
99611113175
99611113170
99611198505
99611112157
99611113154
99760511601
99711152000
99611110800
90037818301
90037810501
90038000501

The product you are viewing cross references to these numbers
EXHAUSTKIT73
Product Information
Product Information
Sports Exhaust GT3 RS Look Porsche 996 C2 / C4

designtek

DesignTek 997 GT3 RS sytle exhaust pipe conversion with 2 x 100mm centre outlets & DesignTek Sports exhaust boxes

Please note:
This exhaust pipe is used when you are fitting a GT3 style centre exit rear bumper

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

EXHAUSTKIT73
3606609701
3606009602
99611112257
99611113254
99611198404
99611113274
99611113275
99611113270
99611198405
99611113168
99611198504
99611113174
99611113175
99611113170
99611198505
99611112157
99611113154

The product you are viewing cross references to these numbers
EXHAUSTKIT74
Product Information
Product Information
Sports Exhaust GT3 RS Look Porsche 996 C2 / C4

danskmotorsport

997 GT3 RS sytle exhaust pipe conversion with 2 x 100mm centre outlets & DANSK Sports exhaust boxes

Please note:
This exhaust pipe is used when you are fitting a GT3 style centre exit rear bumper

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

EXHAUSTKIT74
3606609701
99622096300SEXP
96300SEXP
1620601110

The product you are viewing cross references to these numbers
EXHAUSTKIT76
Product Information
Product Information
Sports exhaust + 200 cell sport catalytic converter + tail pipe set

designtek


Fits:
Porsche 996 C2 / C4 3.4L engines

PLEASE NOTE: Fitting clamps in the images are not included. Available separately.

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.

EXHAUSTKIT76
99622096330S
3606109961
99611196901S
3606009602
99611112257
99611113254
99611198404
99611113274
99611113275
99611113270
99611198405
99611113168
99611198504
99611113174
99611113175
99611113170
99611198505
99611112157
99611113154

The product you are viewing cross references to these numbers
EXHAUSTKIT96
Product Information
Product Information
DesignTek Sports Exhaust + Headers + 200 Cell Exhaust Catalytic Converter

DesignTek 996 Exhaust package. High Grade exhaust system for Porsche 996 1998-2004.

Includes sports mufflers, Equal length headers, Replacement Exhaust Catalytic Converter giving that nice deep sound you can really hear and feel the extra power sports.

Fitting clamps in the images are not included.

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.

EXHAUSTKIT96
99611112257
99611113254
99611198404
99611113274
99611113275
99611113270
99611198405
99611113168
99611198504
99611113174
99611113175
99611113170
99611198505
99611112157
99611113154

The product you are viewing cross references to these numbers
EXHAUSTKIT79
Product Information
Product Information
Sports valvetronic switchable Exhaust + Headers + 200 Cell Exhaust Catalytic Converter

designtek

DesignTek 996 Exhaust package. High Grade exhaust system for Porsche 996 1998-2004.

Includes sports mufflers, headers, Replacement Exhaust Catalytic Converter giving that nice deep sound you can really hear and feel the extra power sports.

Fitting clamps in the images are not included.




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.

EXHAUSTKIT79
3606309601
3606109961
3606009614

The product you are viewing cross references to these numbers
DISPLAYING 1 to 10 (of 10 products)
Also found on these pages
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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