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Porsche 996 (911) (1997-2005) 996 TURBO 2000-05 Exhausts Catalyst / Bypass

Fabspeed RSR Muffler Bypass Pipes. Porsche 964 Carrera (1989-1994) › FSPOR964RSRMB

Fabspeed RSR Muffler Bypass Pipes. Porsche 964 Carrera (1989-1994) - 96411104504 - FS.POR.964.RSRMB

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Fabspeed

FSPOR964RSRMB

Product Information

Fabspeed RSR Muffler Bypass Pipes.

The Fabspeed RSR Muffler Bypass Pipes are a motorsport-inspired exhaust upgrade for Porsche 911 964 Carrera models already equipped with the Fabspeed Maxflo RSR Header/Muffler Kit in its Non-Sport-Cat configuration.

Fits:

Porsche 964 (911) C2 1989-94
Porsche 964 (911) C4 1989-94

Designed to replace the Fabspeed mufflers with direct stainless-steel outlet pipes, they create a considerably less silenced exhaust path and give the air-cooled flat-six a much louder, more aggressive race-car character.

Rather than routing exhaust gases through conventional mufflers, the bypass pipes connect directly to the existing Fabspeed RSR headers. This reduces rear exhaust restriction and removes much of the sound attenuation provided by the mufflers.

The result is a raw, highly audible air-cooled exhaust note inspired by Porsche competition cars and intended primarily for drivers seeking maximum sound and a more direct motorsport experience.

Manufactured in-house by Fabspeed from T304L stainless steel, the pipes are designed for durability, heat resistance and straightforward bolt-on installation.

What This Product Does:
The RSR Muffler Bypass Pipes replace the muffler sections of the compatible Fabspeed exhaust with direct outlet pipes.

They are designed to:

Eliminate the Fabspeed rear mufflers.
Reduce rear exhaust restriction.
Create a more direct exhaust path.
Increase exhaust volume substantially.
Produce a raw air-cooled flat-six sound.
Give the vehicle an RSR / Cup-car-inspired exhaust character.
Reduce the amount of sound attenuation in the exhaust system.
Provide a lightweight and mechanically simple exhaust arrangement.
Allow straightforward conversion back to the Fabspeed mufflers.
Provide a bolt-on modification requiring no cutting or welding.

Symptoms Of Wear Or Failure:~
Possible symptoms include:

Exhaust leaks.
Ticking or blowing noises.
Visible cracks.
Cracked welds.
Soot around joints.
Loose V-band clamps.
Excessive pipe movement.
Exhaust vibration.
Metallic rattling.
Misaligned exhaust outlets.
Pipework contacting bodywork.
Dented or crushed tubing.
Corrosion around mounting hardware.
Exhaust smell around the rear of the vehicle.
Increasing exhaust noise from an unintended leak rather than the outlet.

Because the pipes are intentionally loud, small leaks may be harder to identify by sound alone and should also be checked visually.

Why Replacement Matters:
Replacing damaged bypass pipes helps restore:

Correct exhaust sealing.
Proper system alignment.
Unrestricted exhaust flow.
Reliable V-band connections.
Correct clearance from surrounding components.
Structural integrity.
Consistent exhaust sound.

On a vehicle used for performance driving or track events, maintaining exhaust integrity is particularly important because sustained high engine speeds create considerable exhaust heat.

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.

FSPOR964RSRMB

96411104504

The product you are viewing cross references to these numbers

Related products

Fabspeed Muffler Bypass Pipes. Porsche 996 Turbo (2000-2005)

FSPOR996TMB

Product Information

Fabspeed Muffler Bypass Pipes.

The Fabspeed Muffler Bypass Pipes are a performance-focused exhaust upgrade designed for compatible Porsche 996 Turbo, X50 and GT2 applications.

Fits:

Porsche 996 TURBO 2000-05
Porsche 996 GT2 2001-05

These straight-through pipes replace the Fabspeed Maxflo rear mufflers, creating a much more direct exhaust path from the Fabspeed Sport Catalytic Converters to the exhaust tips. Removing the mufflers substantially increases exhaust volume and gives the 996 Turbo a raw, aggressive motorsport-inspired sound.

The system also removes a considerable amount of rear exhaust weight. Fabspeed states that this configuration saves approximately 50 lb compared with the standard 996 Turbo exhaust system.

These bypass pipes are specifically designed as part of the Fabspeed modular exhaust system. Existing Fabspeed Sport Catalytic Converters are required, and the pipes will not directly fit the original Porsche exhaust or other aftermarket 996 Turbo systems.

What This Product Does:
A conventional rear muffler reduces exhaust noise by forcing exhaust gases through internal chambers, perforated tubes or sound-absorbing structures.

The Fabspeed Muffler Bypass Pipes eliminate the rear mufflers and provide a much more direct path for exhaust gases to travel towards the tailpipes.

Their primary functions and benefits include:

Eliminating the Fabspeed Maxflo rear mufflers
Creating a freer and more direct exhaust route
Producing a considerably louder and more aggressive exhaust note
Reducing rear exhaust system weight
Allowing reuse of compatible factory, aftermarket or Fabspeed exhaust tips
Providing a motorsport-inspired exhaust character
Allowing compatible Fabspeed systems to be converted between muffled and bypass configurations

Fabspeed specifically designed the system to be interchangeable, allowing owners with the required Fabspeed components to change between a muffler and muffler-bypass arrangement.

Symptoms Of Wear Or Failure:
Exhaust bypass pipes contain fewer internal components than conventional mufflers, but they are still exposed to extreme heat, vibration, moisture and road contamination.

Signs that the bypass pipes or their connections may require attention include:

Cracks around welds or pipe joints
Exhaust blowing or hissing sounds
Black soot around leaking connections
Loose clamps or mounting hardware
Excessive movement or vibration
Metallic rattling from loose mounting points
Visible corrosion or surface deterioration
Dents or impact damage to the pipework
Exhaust tips becoming incorrectly aligned
Exhaust fumes escaping from joints before the tailpipes
Unusual changes in exhaust sound
Pipes contacting surrounding bodywork or heat shields

If the vehicle is still fitted with its original mufflers, deterioration may instead appear as rattling internal components, corrosion, cracking, exhaust leaks or damage to the muffler casing.

Why Replacement / Upgrading Matters:

A damaged exhaust pipe or leaking connection can allow hot exhaust gases to escape before reaching the intended outlets. This can create unwanted noise, soot deposits and additional heat around nearby components.
Cracked or poorly supported exhaust components can also move excessively and place additional load on mounting brackets, joints and surrounding parts.
Where the existing Fabspeed Maxflo system is in good condition, fitting the Muffler Bypass Pipes is primarily a performance-sound and weight-reduction upgrade rather than a necessary repair. The bypass configuration removes the rear mufflers and gives the 996 Turbo a significantly more aggressive exhaust character.
For owners using their vehicle for performance driving or seeking a more dramatic exhaust note, the reduced restriction and considerable weight saving can make the bypass configuration particularly attractive.
If replacing worn or damaged exhaust components, restoring secure, correctly aligned pipework also ensures that exhaust gases are directed safely to the rear of the vehicle.

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

FSPOR996TMB

99611102775

99611102776

99611198775

99611198777

The product you are viewing cross references to these numbers

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Fabspeed RSR Muffler Bypass Pipes. Porsche 964 Carrera (1989-1994) › FSPOR964RSRMB