Open Monday - Friday

click to zoom in

Fabspeed Porsche 964 Carrera Primary Muffler Bypass Pipe (1989-1994)

0 reviews Write a Review
Calculated at Checkout
HP (whp):
TQ (ft/lbs):
WT (lbs) KG.s:
-25 / 11.4

A straight pipe replaces the heavy and restrictive factory Porsche OEM primary CENTER muffler and  with a Porsche Motorsports Carrera CUP style straight pipe. The CUP primary muffler bypass pipes 100% improves sports car sound,  significantly increases horsepower and redeuces weight from the best area to remove weight RIGHT behind the license plate.


All Porsche 964 coupes and cabriolets will be sportier and have a more aggressive Flat-Six sports car sound  than the stock muffler.  With the stock OEM Porsche 964 catalytic converter , a Primary muffler bypass pipe installed and the Stock 964 2ndary side rear muffler the car is 100% daily driveable BUT sporty flat six sound. A great additional upgrade is our 964 CUP aluminum airbox coverlid piece. 


DYNO verified from Porsche and Fabspeed +12.5HP and 10 wheel horsepower - real world seat of your pants gain from this muffler bypass pipe system. 


  • Fits all Porsche 964 C2, C4, RS America, Euro RS and Speedster vehicles 1989-1994
  • Increases power by +12HP (10 horsepower to the wheels) and vastly improves throttle response 
  • Saves 25 lbs from the furthermost area of rear of the vehicle for much better handling. 
  • 100% cat-back complies with any and all emissions 50 state emissions laws and international emissions.
  • A replica of the Porsche Motorsports 964 CUP primary muffler bypass pipe as used by Porsche in the 1990-1994 Carrera CUP race series that was a lead up Race in all European Formula 1 events. 
  • Constructed from high-quality 14-16ga CNC mandrel-bent T304L stainless steel for optimum flow and maximum durability
  • Simple DIY bolt-on installation- reuse the 2 factory Porsche ball clamps and donuts. Fabspeed supplies all other hardware. 
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty

Returns Policy

To RETURN any system, product or merchandise you must contact us first for a Return Authorization (RA) Number. Special order and custom made systems, apparel, Carbon Fiber Wall Art, and other certain merchandise are NOT returnable. ALL SALES ARE FINAL. To return a Fabspeed Motorsport product an RA number must be requested and if granted the item(S) must be in original Fabspeed Motorsport sealed packaging. A copy of the original invoice and a brief explanation must accompany all returned items. You must follow our instructions for returning items carefully, or Fabspeed Motorsport reserves the right to charge a 25% restocking fee on any OPENED box or repackaged products. Customers are responsible for return shipping charges. If an order was shipped with a promotional “Free Shipping”, and the order is returned, we exclusively reserve the right to charge the customer or distributor for the cost of that original shipping and handling. If a Fabspeed Motorsport Performance package is ordered, and an individual component of that package is returned, Fabspeed Motorsport reserves the right to charge back the performance package discount along with any additionally offered discounts. Return shipped items DAMAGED in transit will RESULT in additional charges up to and including rejection of the competent. It is the customer’s responsibility to ship safely and properly. No returns accepted after 30 days from the invoice date. No credits will be given after 30 days from the invoice date.

To qualify for return, the product must be unused and remain in the original packaging, as well as match the current design and packaging for the product at the time of return. Sounds is subjective and therefore does not qualify for a return of a used product. See Sound Solution Guarantee to see if your product is covered.

Periodically mistakes are made when ordering, or a wrong part is shipped, and you may wish to return an item. We will do everything reasonable to satisfy you. Please contact Fabspeed Motorsport immediately via email at to discuss the circumstances before returning any products. Anything returned without prior authorization from Fabspeed Motorsport will be refused. All returns must be sent back fully prepaid. Our customer service department ( will issue a Return Authorization Number, which must accompany any return. A copy of the original invoice and a brief explanation must accompany all returned items. No returns accepted after 30 days from the invoice date. No credits given after 30 days.


Fabspeed Motorsport cannot be held liable for refusal of, delay of, loss of, theft or damage to a shipment of any item. The customer agrees to indemnify Fabspeed Motorsport for all costs, fees and expenses Fabspeed Motorsport incurs as a result of any violation of any local, state, federal, national or international laws or regulations. Customer agrees to take responsibility for lost packages that were not independently insured or sent without requiring signature. The customer understands they will be liable in the event of additional fees, tariffs, or legal issues such as border seizure. Customer accepts these risks and agrees to release Fabspeed Motorsport of all liability.

Fabspeed Motorsport reserves the right to charge a shipping and handling fee on every order being shipped from our facility. This fee is universal and applies to all retail and wholesale purchases and cannot be waived or credited.

A 6% sales tax will be implemented for every purchase made by a Pennsylvania resident. This fee will be charged for in-house installations and products purchased online, over the phone, and/or via email, this fee is required by law, is non-negotiable and non-refundable.

Customer Reviews

Write a Review Hide Reviews Show Reviews

We're currently working to get more reviews for this product. In the meantime, please take a look at our reviews from other platforms.