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Catalyst / Bypass

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DISPLAYING 1 to 20 (of 20 products)
DesignTek Sports Exhaust Package (+15 to 20bhp) Porsche 996 C2 / C4
Code: EXHAUSTKIT26
Sports Cat Bypass + Headers Package (+15 to 20bhp)

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.

*Please note Cat bypass systems may not be emissions legal in all counties

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Related, superseded, cross reference or alternative numbers for comparison.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
About this kit
Kit
DesignTek Sports Exhaust Package Porsche 996 C2 / C4
Code: EXHAUSTKIT24
Sports Exhaust + Headers + Cat Bypass Package

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 mufflers, Equal length sports headers and sports cats bypass pipes.

*Please note Cat bypass systems may not be emissions legal in all counties

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Related, superseded, cross reference or alternative numbers for comparison.

EXHAUSTKIT24
3606009602
3606309601
3606209961
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
About this kit
Kit
DesignTek Sports Exhaust Package Porsche 996 C2 / C4
Code: EXHAUSTKIT27
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.

*Please note this system fits with factory headers or sports after market. Cat bypass systems may not be emissions legal in all counties

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Related, superseded, cross reference or alternative numbers for comparison.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

The product you are viewing cross references to these numbers
About this kit
Kit
DesignTek Sports Exhaust Package Porsche 996 C2 / C4 / C4S
Code: EXHAUSTKIT28
Sports Exhaust VALVETROINC + X-Pipe Design 200 Cell Sports Cats Package

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!
About this kit
Kit
DesignTek Sports Exhaust Package Porsche 996 C2 / C4 / C4S
Code: EXHAUSTKIT34
Sports Exhaust + 200 Cell X-Pipe Ø55mm Sports Cats Package

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!

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

The product you are viewing cross references to these numbers
About this kit
Kit
Exhaust Catalyst fitting kit - Porsche 996 C2 / C4
Code: FITTINGKIT27
Exhaust Catalyst fitting kit. Aftermarket component with stainless steel cat bolts and nuts.

oematch 


Fits:
Porsche 996 Carrera 3.4L
Porsche 996 Carrera 3.6L

Kit includes:

2 x 99711152000/1 EXHAUST to CAT CLAMP
2 x 99611111350/1 EXHAUST MANIFOLD to CAT GASKET
2 x 99906402601/1 SCREW PLUG
2 x N0138322 SEAL RING
6 x 90007428702/1 BOLT HEX-HD M8X35
6 x 99908405202/1 EXH NUT for HEAT EXCHANGER M8
2 x 90008308000 BOLT HEX-HD
2 x 90012305020 SEALING RING

About this kit
Kit
Exhaust Catalysts Fitting Kit. Porsche (911) 996 C2 /C4 / C4S
Code: FITTINGKIT16
Exhaust Catalysts Fitting Kit. All Original components.

porsche 


Fits:
Porsche 996 Carrera 3.4L
Porsche 996 Carrera 3.6L

Kit Includes:
2 x 99611122002 EXHAUST to CAT CLAMP
2 x 99611111350 EXHAUST MANIFOLD to CAT GASKET
2 x 99906402601 SCREW PLUG
2 x N0138322 SEAL RING
6 x 90007428702 BOLT HEX-HD M8X35
6 x 99908405202 EXH NUT for HEAT EXCHANGER M8
2 x 90008308000 BOLT HEX-HD
2 x 90012305020 SEALING RING



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

FITTINGKIT16
99611122002
99611111350
99906402601
90007428702
99908405202
90008308000
90012305020
N0138322

The product you are viewing cross references to these numbers
About this kit
Kit
Sports Exhaust, Headers & Replacement Catalytic Converter Package Porsche 996 C2 / C4 / C4S
Code: EXHAUSTKIT96
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.

Please note: This will not fit the early 3.4L 996 with only pre cat sensors. You can modify the cats and relocate the sensor hole. Please contact our office for more details

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

EXHAUSTKIT96
3606009602
3606309601
3606109961
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
About this kit
Kit
Exhaust Cat Bypass Pipes DesignTek Porsche 996 Turbo
Code: 3606009655
Replacement Exhaust Cat Bypass Pipes

designtek

Replacable catalyse bypass pipes to be used with DesignTek sports exhaust systems Part No. 3606009605. Bypass pipes are for track use only.

DesignTek Bypass FREE FLOW pipes when using these pipes you will require an ECU re-map as this system is designed for tuned vehicles. Made from high grade T304 stainless steel.

Fits:
Porsche 996 Turbo 2000-05
Porsche 996 GT2

Please note: sports catalytic converters or bypass pipes do have type approval and may not be legally installed on vehicles manufactured after 1st March 2001. They can not be used on a public road and are not MOT compliant, they are designed for race and track cars only. 


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

3606009655
99611102775
99611102776
99611198775
99611198777

The product you are viewing cross references to these numbers
Best Product
Exhaust catalytic bypass pipes. Porsche 996
Code: 99611196260S
Exhaust catalytic bypass pipes, dummy, Stainless Steel.

dansk

Fits:
Porsche 996 3.4-3.6L C2 / C4 / C4S 1997-05

Please note: These sport cats will make your car sound louder than with stock cats. If you have ,or intend to install sport silencers, you may find the car is a bit loo loud. We recommend to use one sport exhaust component if you are concerned about decibel levels.

Please note: sports catalytic converters or bypass pipes do have type approval and may not be legally installed on vehicles manufactured after 1st March 2001. They can not be used on a public road and are not MOT compliant, they are designed for race and track cars only. 


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

99611196260S
99611302154
99611302157
99611302156
99611302152
99611302155
99611302159
99611302254
99611302257
99611302256
99611302252
99611302255
99611302259
99611301258
99611302260
99611302160
99611196260S
1620301710
96.260S

The product you are viewing cross references to these numbers
Best Price
Exhaust Catalytic Converter 200 Cells Race X-Pipes DesignTek for Porsche 996
Code: 3606109963
Exhaust Catalytic Converter 200Cells Race X-Pipes with LARGE BORE 63mm diameter tubing pipes

designtek

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 backpressure and less restriction.

DesignTek sports racing catalytic converters for less restriction and more power and more sports car sound. Simple bolt-on direct replacement sports cats for the factory OEM Porsche catalytic converters.

PLEASE NOTE THESE CATS MAY REQUIRE A REMAP TO ENSURE NO DASHBOARD LIGHTS - Please contact your local tuning shop to have this done!

Fits:
Porsche 996 Carrera 3.4L / 3.6L

Please note: These sport cats will make your car sound louder than with stock cats. If you have ,or intend to install sport silencers, you may find the car is a bit loo loud. We recommend to use one sport exhaust component if you are concerned about decibel levels.

Please note: sports catalytic converters or bypass pipes do have type approval and may not be legally installed on vehicles manufactured after 1st March 2001. They can not be used on a public road and are not MOT compliant, they are designed for race and track cars only. 



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

3606109963
99611302154
99611302157
99611302156
99611302254
99611302257
99611302256
99611302152
99611302155
99611302159
99611302252
99611302255
99611302259
99611302258
99611302260
99611302158
99611302160

The product you are viewing cross references to these numbers
Best Product
Exhaust Catalytic Converter Bypass Pipes for Porsche 996 1997>> DesignTek Evolution
Code: 3606209961
Exhaust Catalytic Converter Bypass Pipes  (SET OF 2 Left & Right)


designtek  

The DesignTek® Evolution range of products are premium manufactured performance exhaust systems built with exceptional technology. The products are dyno tested with proven Hp gains built to rigorous TÜV and ISO 9001 quality certification standards.

DesignTek® Evolution exhausts are built for the "tuners market" high performance modified vehicles. With over 50 years of experience the products are built to the highest technical level by the manufacturing team behind the DesignTek® Evolution range.

This product may trip the engine check light, you will need to either re-map the vehicle so that it is reading the lambda sensors correctly, or fit some extra lambda sensor extensions our part number 00060612300, the product has holes for the lambda sensors. The cat bypass will increase the power delivery also give the car a deeper sporty sound.

Details:
- More power and sportscar sound.
- More power upto +10hp.
- Saves 30lbs 15 KG from rear of your 996.

*A re-map to the ECU may require when fitting these cats.

Fits
Porsche 996 Carrera 3.4L
Porsche 996 Carrera 3.6L

Please note: These sport cats will make your car sound louder than with stock cats. If you have ,or intend to install sport silencers, you may find the car is a bit loo loud. We recommend to use one sport exhaust component if you are concerned about decibel levels.

Please note: sports catalytic converters or bypass pipes do have type approval and may not be legally installed on vehicles manufactured after 1st March 2001. They can not be used on a public road and are not MOT compliant, they are designed for race and track cars only. 



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

3606209961
99611302154
99611302157
99611302156
99611302254
99611302257
99611302256
99611302152
99611302155
99611302159
99611302252
99611302255
99611302259
99611302258
99611302260
99611302158
99611302160

The product you are viewing cross references to these numbers
Best Product
Exhaust Catalytic Converter Bypass Pipes. Porsche 996 GT3
Code: 99611112108
Exhaust Catalytic Converter Bypass Pipes

designtek

Fits:
Porsche 996 GT3

2ND ARY CATALYTIC BYPASS PIPES
More power and sportscar sound
More power on 996 GT3 +12HP
more sports car sound
Saves 30lbs 15 KG from rear of your 996.

Not UK MOT appoved

*A re-map to the ECU may require when fitting these cats.

Please note: These sport cats will make your car sound louder than with stock cats. If you have ,or intend to install sport silencers, you may find the car is a bit loo loud. We recommend to use one sport exhaust component if you are concerned about decibel levels.


Please note: sports catalytic converters or bypass pipes do have type approval and may not be legally installed on vehicles manufactured after 1st March 2001. They can not be used on a public road and are not MOT compliant, they are designed for race and track cars only. 



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

99611112108
99611112108
99611302193
996113021EX
99611302197
996113021FX
99611302293
996113022EX
99611302297
996113022FX

The product you are viewing cross references to these numbers
Best Product
Exhaust Catalytic Converter Pipes DesignTek for Porsche 996
Code: 3606109961
Exhaust Sports 200 Cell Catalytic Converter Pipes.  (SET OF 2 Left & Right)

designtek

DesignTek Sport 200 Cell catalytic converters 996 Sport Cats Give a gain of +12 to 15BHP.
Made from high grade stainless steel.

Only for cars with pre & after sensors

Fits:
Porsche 996 Carrera 3.4L / 3.6L

A Voucher for £100 available when you buy this product. For more information  CLICK HERE

Please note: These sport cats will make your car sound louder than with stock cats. If you have, or intend to install sport silencers, you may find the car is a bit loo loud. We recommend to use one sport exhaust component if you are concerned about decibel levels.

Please note:
Sports catalytic converters or bypass pipes do have type approval and may not be legally installed on vehicles manufactured after 1st March 2001. They can not be used on a public road and are not MOT compliant, they are designed for race and track cars only.

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

3606109961
99611302154
99611302157
99611302156
99611302254
99611302257
99611302256
99611302152
99611302155
99611302159
99611302252
99611302255
99611302259
99611302258
99611302260
99611302158
99611302160

The product you are viewing cross references to these numbers
Best Product
Exhaust heat shield. Porsche 996 Turbo
Code: 99611120
Exhaust heat shield for Silencer with catalyst

porsche

Fits:
Porsche 996 Turbo 2001-05

Click 'Zoom in' for large parts diagram.
Diagram ref no 19

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

99611120
99611120572
99611120672

The product you are viewing cross references to these numbers
Porsche Genuine Parts
Exhaust sleeve catalytic converter to silencer. Porsche 996 / 997
Code: 99711152000/1
Exhaust sleeve catalytic converter to silencer.
connecting sleeve from cat to rear silencer. Price is for each sleeve.

oematch

Fits:
Porsche 996 1998-05 (not Turbo and GT2)

Porsche 997 2005>> (not Turbo and GT2)

Porsche 991 Carrera C2 3.4L (350Bhp)
Porsche 991 Carrera C2S 3.8L (400Bhp)
Porsche 991 Carrera C4 3.4L (350Bhp)
Porsche 991 Carrera C4S 3.8L (400Bhp)
   Fits cars with and without sport exhaust

Click 'Zoom in' for large parts diagram.
Diagram ref no 13



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

99711152000
004-854
99611122002
99611122002
99711152000
1621400600
1621401600

The product you are viewing cross references to these numbers
Best Product
Exhaust sleeve in titanium catalytic converter to silencer. Porsche 996 / 997
Code: 99711152000/2
Titanium (grade 5) Exhaust sleeve catalytic converter to silencer.
Connecting sleeve from cat to rear silencer. Price is for each sleeve.

rohler

Fits:
Porsche 996 1998-05 (not Turbo and GT2)
Porsche 997 2005>> (not Turbo and GT2)
Porsche 991 Carrera C2 3.4L (350Bhp)
Porsche 991 Carrera C2S 3.8L (400Bhp)
Porsche 991 Carrera C4 3.4L (350Bhp)
Porsche 991 Carrera C4S 3.8L (400Bhp)

Fits cars with and without sport exhaust
Grade 5 titanium is resistant to salt water and variety of corrosive media temperatures below 300°C

Click 'Zoom in' for large parts diagram.
Diagram ref no 13



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

99711152000
004-854
99611122002
99611122002
99711152000
1621400600
1621401600

The product you are viewing cross references to these numbers
Best Product
Exhaust Sport Catalytic Converter Pipes. Porsche 996 2001-05
Code: 996PO96270S
Exhaust Sport Catalytic Converter Pipes. Polished Stainless steel.

dansk

Fits:
Porsche 996 3.6L 2001-05 (not Turbo and GT2)

Please note: These sport cats will make your car sound louder than with stock cats. If you have ,or intend to install sport silencers, you may find the car is a bit loo loud. We recommend to use one sport exhaust component if you are concerned about decibel levels.

Please note: sports catalytic converters or bypass pipes do have type approval and may not be legally installed on vehicles manufactured after 1st March 2001. They can not be used on a public road and are not MOT compliant, they are designed for race and track cars only. 


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

996PO96270S
99611302154
99611302157
99611302156
99611302152
99611302155
99611302159
99611302254
99611302257
99611302256
99611302252
99611302255
99611302259
99611301258
99611302260
99611302160
PO96270S
1620301110
PO-96270S

The product you are viewing cross references to these numbers
Best Price
Lambda Sensor Blanking Plug and Receiver Socket. Porsche 996 / 997
Code: 100390100392
Lambda Sensor Blanking Plug and Receiver Socket Set.
In case you need to relocate your existing lambda probe because it's not in the right location. Welding and cutting specialist required.


Fits:
Many Porsche vehicles. Universal kit.

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

100390100392
100390
100392

The product you are viewing cross references to these numbers
Best Price
Replacement exhaust catalytic converter for Porsche 996
Code: 99611302
Standard Replacement Exhaust Catalytic Converter for Porsche 996 3.4L 400 Cell
Not suitable for cars with stricter emissions M661

designtek

We recommend you change cats in a pair. For cars with only 2 lambda sensors like the Porsche Carrera 996 3.4L models please also buy Code: FITTINGKIT16

PORSCHE 996 Carrera 3.4L Replacement Cats made in grade 409 stainless steel.

Fits:
Porsche Carrera 3.4L

Our cat is made up of the following components:
  • Ceramic monolith of a honeycomb design to allow free air flow and maximum surface area, coated with precious metals to enable the conversion of gasses that pass through it
  • Interam matting to hold the monolith in place. The matting expands when exposed to heat to supply the pressure needed to keep the monolith secure
  • A grade 409 stainless steel can (or housing) to provide protection and enable the cat to be built into the exhaust system. 409 grade can contain upto 90% iron and will be prone to rust. It still has higher rust-resistant properties than mild steel.


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

99611302
99611302154
99611302157
99611302156
99611302254
99611302257
99611302256
99611302152
99611302155
99611302159
99611302252
99611302255
99611302259
99611302258
99611302260
99611302158
99611302160

The product you are viewing cross references to these numbers
Best Product
DISPLAYING 1 to 20 (of 20 products)
Also found on these pages
About Catalyst / Bypass

Title: Porsche Exhaust Catalyst and Bypass Sports Catalyst: Technical Specifications and Benefits

Key Points:

Enhanced Performance: Upgrading your Porsche's exhaust catalyst or opting for a bypass sports catalyst can significantly improve performance by increasing horsepower and torque output. These aftermarket options are designed to optimize exhaust flow, resulting in improved engine efficiency and throttle response.

Enhanced Sound: An original Porsche or aftermarket exhaust catalyst can enhance the auditory experience of your vehicle. They offer a deeper, more aggressive exhaust note, providing a sportier sound that complements the performance-oriented nature of a Porsche.

Compliance with Emissions Standards: When purchasing an exhaust catalyst, it is crucial to consider its compliance with local emissions regulations. Porsche exhaust catalysts are engineered to meet strict emissions standards, ensuring that your vehicle remains environmentally friendly while delivering enhanced performance.

Quality and Durability: Original Porsche exhaust catalysts are manufactured to the highest standards, ensuring exceptional quality and durability. Aftermarket options from reputable brands also offer similar reliability, providing a long-lasting solution for your Porsche's exhaust system.

Easy Installation: Both original Porsche and aftermarket exhaust catalysts are designed to be direct replacements, making installation relatively straightforward. However, it is essential to follow the manufacturer's instructions or seek professional assistance to ensure proper fitment and optimal performance.

At Design911, we understand the importance of finding the correct part for your Porsche and providing the best professional advice. Our dedicated team of experts specializes in Porsche parts and accessories, including exhaust catalysts. With our extensive knowledge and experience, we can assist you in finding the right exhaust catalyst or bypass sports catalyst for your Porsche model, taking into account your specific requirements and local regulations. We are committed to delivering top-quality products and ensuring customer satisfaction. Contact us today for personalized assistance and an enhanced driving experience with your Porsche.

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