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Porsche > 964 (911) (1989-1994) > 964 (911) RS 3.6L 1991-93 > Exhausts > Catalyst / Bypass >

Sports exhaust catalytic converter delete high flow pipes Porsche 991.2 Carrera and Carrera S  ❭  TSPO991T16.403.ANK

Sports exhaust catalytic converter delete high flow pipes Porsche 991.2 Carrera and Carrera S
3
Check vehicle fitment
TSPO991T16.403.ANK
Product Information
Product Information
Sports exhaust catalytic converter delete pipes Porsche 991.2 Carrera and Carrera S for cars with standard exhaust 2017-2019

tubi

Fits
Porsche 991.2 Carrera with standard exhaust
Porsche 991.2 Carrera S with standard exhaust

RACETRACK USE ONLY
These components are designed and developed for racetrack use and to maximise the car's performance. They are not street legal and must be installed by professionals in the sector

CATALYTIC CONVERTER REMOVAL
These high flow pipes replace the catalytic converters and minimise exhaust back pressure to deliver optimum results in terms of performance and weight reduction

INSTALLATION
This product can only be mounted on Carrera and Carrera S versions equipped with a standard exhaust system (and NOT a Porsche Sports Exhaust-PSE)
The component is perfectly interchangeable with the original components, following the instructions in the constructor's workshop manual

ECU REMAPPING FOR PERFORMANCE
On turbo cars, catalytic converter replacement may modify turbocharger operating conditions and cause a deterioration of the torque delivery curve. To ensure full benefit from the new racing component, the engine's ECU must be reprogrammed to maximise performance. If the engine warning light comes on, the ECU must always be reprogrammed to eliminate it

MATERIAL
AISI 304 STAINLESS STEEL
A choice stainless steel ideal for aggressive environments where combustion emissions can cause serious chemical corrosion on other types of metal

NOTE: 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 in the United Kingdom. They are not MOT compliant and must not be used on public roads. These components are intended for race and track use only. If you are located outside the UK, please consult your local laws and regulations to ensure compliance.
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Fits:
Many Porsche vehicles. Universal kit.

Related reference numbers
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100390100392
100390
100392

The product you are viewing cross references to these numbers
Catalytic converter repair flange. Porsche 964 C2 / C4 / RS - 96411104205, 96411321310, 96411321306, 96411321316, 96411321317, 96421103905, 96421103932 - 9M96411104205
4
Catalytic converter repair flange. Porsche 964 C2 / C4 / RS
9M96411104205
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Product Information
Catalytic converter repair flange


Fits:
Porsche 964 (911) C2 1989-93
Porsche 964 (911) C4 1989-93
Porsche 964 (911) RS 3.6L 1991-93
Porsche 964 (911) RS 3.8L 1991-93

Ninemeister Converter Repair Flange 

Over time, age, heat cycles, and corrosion take their toll on Porsche exhaust systems. A common weak point is the catalytic converter flange, which can corrode and eventually disintegrate. When this happens, it compromises the seal in your exhaust system, leading to exhaust leaks, loss of performance, and increased noise.

The Ninemeister repair flange is a high-quality replacement solution designed specifically to restore your Porsche’s exhaust integrity.

Key Features

  • Direct Repair Solution – allows you to remove the corroded flange and re-weld this precision-machined replacement in place.
  • Durable Construction – built to withstand the extreme heat and corrosive conditions of Porsche exhaust systems.
  • Restores Exhaust Sealing – eliminates leaks, restores back pressure, and ensures smooth engine performance.
  • Cost-Effective Repair – no need to replace the entire catalytic converter when only the flange is damaged.
  • Tailored Fitment – engineered to match Porsche specifications for proper alignment and fit.

Why Replace a Corroded Converter Flange?

  • Eliminate Exhaust Leaks – prevent harmful gases from escaping and affecting cabin safety.
  • Restore Performance – exhaust leaks reduce back pressure, causing poor throttle response and reduced efficiency.
  • Prevent Further Damage – corrosion at the flange can spread, leading to costly catalytic converter or exhaust system replacements.
  • Long-Term Reliability – a fresh flange ensures your exhaust remains structurally sound for years to come.

The Ninemeister catalytic converter repair flange provides a reliable, cost-effective fix for corroded catalytic converter flanges, helping you keep your Porsche exhaust system safe, efficient, and true to factory performance.

Section of diagram ref no 1






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

9M96411104205
96411104205
96411321310
96411321306
96411321316
96411321317
96421103905
96421103932

The product you are viewing cross references to these numbers
Catalytic converter repair flanges and mounting hardware kit. Porsche 964 C2 / C4 / RS - 96411104205, 96411321310, 96411321306, 96411321316, 96411321317, 96421103905, 96421103932 - 9M96411104205
6
Catalytic converter repair flanges and mounting hardware kit. Porsche 964 C2 / C4 / RS
9M96411104205KIT
Product Information
Product Information
Catalytic converter repair flanges and mounting hardware kit


Fits:
Porsche 964 (911) C2 1989-93
Porsche 964 (911) C4 1989-93
Porsche 964 (911) RS 3.6L 1991-93
Porsche 964 (911) RS 3.8L 1991-93

Kit Includes
2 x Catalytic converter / heat exchanger cross over flange
1 x Catalytic converter gasket
1 x Heat exchanger gasket
6 x Heat exchanger to cylinder head seal ring
4 x Heat exchanger barrel nut
16 x Exhaust lock nut
8 x Exhaust bolt M8 x 40

Ninemeister Converter Repair Flange 

Over time, age, heat cycles, and corrosion take their toll on Porsche exhaust systems. A common weak point is the catalytic converter flange, which can corrode and eventually disintegrate. When this happens, it compromises the seal in your exhaust system, leading to exhaust leaks, loss of performance, and increased noise.

The Ninemeister repair flange is a high-quality replacement solution designed specifically to restore your Porsche’s exhaust integrity.

Key Features

  • Direct Repair Solution – allows you to remove the corroded flange and re-weld this precision-machined replacement in place.
  • Durable Construction – built to withstand the extreme heat and corrosive conditions of Porsche exhaust systems.
  • Restores Exhaust Sealing – eliminates leaks, restores back pressure, and ensures smooth engine performance.
  • Cost-Effective Repair – no need to replace the entire catalytic converter when only the flange is damaged.
  • Tailored Fitment – engineered to match Porsche specifications for proper alignment and fit.

Why Replace a Corroded Converter Flange?

  • Eliminate Exhaust Leaks – prevent harmful gases from escaping and affecting cabin safety.
  • Restore Performance – exhaust leaks reduce back pressure, causing poor throttle response and reduced efficiency.
  • Prevent Further Damage – corrosion at the flange can spread, leading to costly catalytic converter or exhaust system replacements.
  • Long-Term Reliability – a fresh flange ensures your exhaust remains structurally sound for years to come.

The Ninemeister catalytic converter repair flange provides a reliable, cost-effective fix for corroded catalytic converter flanges, helping you keep your Porsche exhaust system safe, efficient, and true to factory performance.

Section of diagram ref no 1, 3, 4, 5, 6, 7, 8 and 12.



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

9M96411104205KIT
96411104205
96411321310
96411321306
96411321316
96411321317
96421103905
96421103932

The product you are viewing cross references to these numbers