Catalyst / Bypass

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

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9M96411104205

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Exhaust Catalytic Converter Bypass Pipes



DesignTek stainless steel catalyst by-pass produces more air flow which in turn produces more power. Designed to give a deeper more sporter sound.

This product comes with the hole to re-fit the lambda sensor.

Fits:
Porsche 964 C2 / C4 1989-94

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.

Design 911 Recommends this product best value and best quality

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.

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3606209641

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Exhaust Catalytic Converter Pipes 100 Cell



DesignTek stainless steel sports 100 cell catalyst, with German hi-flow catalyst. Produces more air flow which in turn produces more power. Designed to give a deeper more sporter sound.

This product comes with the hole to re-fit the lambda sensor.

Fits:
Porsche 964 C2 / C4 1989-94

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.

Design 911 Recommends this product best value and best quality

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
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3606109641

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Sports Catalytic Converter with catalytic ceramic insert, 100 cell. With Lambda sensor hole and plug. Polished stainless steel.



Fits:
Porsche 964 C2 / C4 1990-94

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
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1620301400

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Sports Catalytic Converter without catalytic ceramic insert. With Lambda sensor hole and plug. Polished stainless steel. This is a Cat bypass product.

Fits:
Porsche 964 C2 / C4 1990-94

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.

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.

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96421100391

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Intermediate Pipe replacement in stainless steel. Grey painted.



Fits:
Porsche 930 3.0L Turbo 1975-77
Porsche 930 3.3L Turbo 1978-89
Porsche 964 Turbo 3.3L-3.6L 06/1991-07/1993

Please note:
This part will fit most of cars straight away but some may require alteration.
Porsche made a few different versions of the pipe over the years which all had a slightly different shape. (although Porsche used one number)
If this pipe is out you would need to loosen all the bolts on the exhaust system (Including the turbo) and mount the pipe into place afterwards.

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93011100304

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Intermediate Pipe replacement in stainless steel. Glass bead blasted finish.



Fits:
Porsche 930 3.0L Turbo 1975-77
Porsche 930 3.3L Turbo 1978-89
Porsche 964 Turbo 3.3L-3.6L 06/1991-07/1993

Please note:
This part will fit most of cars straight away but some may require alteration.
Porsche made a few different versions of the pipe over the years which all had a slightly different shape. (although Porsche used one number)
If this pipe is out you would need to loosen all the bolts on the exhaust system (Including the turbo) and mount the pipe into place afterwards.

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93011100304SS

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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.

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100390100392

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Unlock maximum performance for your Porsche 964 Turbo with Fabspeed’s all-in-one Performance Package. This comprehensive upgrade includes a high-flow dual outlet Maxflo muffler, high-performance sport headers with full heat functionality and braided oil lines, and a lightweight, dyno-proven cold air intake system with a BMC air filter - delivering gains in power, sound, and throttle response across the board.  

Fits:
Porsche 964 Turbo (965) 1991-92
Porsche 964 Turbo (965) 1993-94

Kit Contents:

Fabspeed’s high-flow sport headers are designed to retain full cabin heat functionality while unlocking noticeable performance gains. Thanks to a shorter exhaust gas path and smooth mandrel bends, these headers dramatically improve exhaust flow - boosting power, sharpening throttle response, and reducing turbo lag, with boost onset up to 1500 RPM earlier than stock. They also deliver a mild increase in volume, a more pronounced turbo spool sound, and a deeper, more aggressive exhaust tone.

- Constructed from 14-16ga CNC mandrel-bent T304L stainless steel with high velocity F1-style merge collectors for optimum exhaust flow.
- This system will include a drip accumulator with double swivels and Aeroquip lines with adaptors, plus graphite steel layered gasket for a leak proof seal. 
- 7/8"custom braided oil lines with correct 30mm radius Porsche style ball end with OEM fittings will be included to replace the stock oil lines. 
- Retains the stock cabin cockpit heat functionality.
- Simple DIY (Do-It-Yourself) bolt-on installation, no cutting or welding required.
- Backed by Fabspeed's Lifetime Warranty.  

Fabspeed's Maxflo dual outlet muffler delivers a deep, aggressive exhaust note along with a significantly enhanced turbo spool sound—bringing out the true character of your 964 Turbo.  

- Increased horsepower and torque throughout the RPM range. 
- Includes Fabspeed's Deluxe Outlet Tips; polished angle-cut ovals.
- Maxflo Mufflers are radius stress relieved, hydro-formed cases that are pulse TIG welded with 2000 degree ceramic fiber and stainless steel wool packing.
- Constructed from high-quality 14-16 gauge C.N.C. mandrel-bent T304L stainless steel for optimum flow and maximum durability.
- Complete 3.0" tubing for maximum flow.
- Includes 4.5" wastegate tip and all required hardware.
- Simple DIY (Do-It-Yourself) bolt-on installation, no cutting or welding required.
- Backed by Fabspeed's Lifetime Warranty.  

Fabspeed’s high-performance intake system replaces the outdated, heavy steel factory airbox found on 930 and 964 Turbo (965) models - a design originally from the 1970s and '80s that traps heat like a Dutch oven and severely limits airflow. This factory setup bakes the intake air, reducing performance and efficiency. In contrast, Fabspeed’s Cold Air Intake is engineered to reduce weight and deliver significantly cooler, denser air directly to the engine - resulting in dyno-proven horsepower and torque gains.  

- Saves maintenance time, and weighs much less, for better handling and cooler engine temperatures.  
- Increases horsepower and torque by +17.5 HP and +26 ft-lbs. 
- Significant weight savings along with finally an uncluttered CLEAN to BE SEEN awesome engine bay.
- Cleans up engine bay for easier access for maintenance and car shows!  
- Allows fitment of larger intercoolers versus banging into the steel heavy airbox.   
- Supports up to 550+ horsepower.
- VIDEO- installation instructions and photos online. Super simple engineered system.   
- Used and installed by a WHOs WHO of Porsche Turbo engine builders Worldwide!  
- CAD Designed and DYNO developed 100% Guaranteed to be the very best air intake for your 964 Turbo!
- Backed by Fabspeed's Lifetime Warranty.

FITMENT NOTE: After the initial heat cycle, be sure to retighten all exhaust bolts to OEM torque specs to ensure a proper, lasting seal.

NOTE: This system replaces the factory catalytic converter with a high-flow setup and is not MOT compliant, meaning it is intended for race and track use only and must not be used on public roads. If you are located outside the UK, please check your local laws and regulations to ensure compliance before installation.  

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FSPOR964TSPKG

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