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

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HP (whp):
TQ (ft/lbs):
WT (lbs) KG.s:
-25 / 11.4
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Fabspeed Porsche 964 Carrera Primary Muffler Bypass Pipe (1989-1994)


Replaces the heavy and restrictive factory Primary muffler system with a Porsche Motorsports Carrera CUP style straight pipe. Reduce weight, improve sound, and increase power.


This exhaust system will be much louder and more aggressive than the stock muffler. 


We saw a 10 whp gain from this system. 


  • Fits all Porsche 964 C2, C4, RS America, Euro RS and Speedster vehicles 1989-1994
  • Increases power by +10 whp and improves throttle response 
  • Saves 25 lbs from the rear of the vehicle for much better handling
  • Designed for racing or auto-X (More aggressive than the Maxflo Muffler System)
  • A replica of the Porsche Motorsports 964 CUP primary muffler bypass pipe as used by Porsche in the 1990-1994 Carrera CUP race series
  • Constructed from high-quality 14-16ga CNC mandrel-bent T304L stainless steel for optimum flow and maximum durability
  • Simple DIY bolt-on installation, no cutting or welding required

  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty


Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.