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Fabspeed Porsche 991 Carrera Valvetronic Center Muffler Bypass X-Pipe (3.8L & PSE Only) (2012-2016)

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$2,295.95 - $2,495.95
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Fabspeed Porsche 991 Carrera Valvetronic Center Muffler Bypass X-Pipe (3.8L & PSE Only) (2012-2016)

$2,295.95 - $2,495.95

Fabspeed Porsche 991 Carrera Valvetronic Center Muffler Bypass X-Pipe (3.8L & PSE Only) (2012-2016)

$2,295.95 - $2,495.95

Improve the tone of your exhaust, increase power and save weight from your 991 Carrera with a Valvetronic Center Muffler Bypass X-Pipe. This Valvetronic exhaust preserves the functionality of your stock PSE system and if your car does not have PSE you can add that functionality with our valve controller that can be included with this exhaust. This exhaust great compliment to either the factory PSE side mufflers or to Fabspeed's Maxflo Performance Side Exhaust System


With the valves open you'll be treated to an aggressive sporty exhaust note and with them closed you'll experience a smoother tone than the factory Porsche exhaust system.


This system saw an increase of 16 whp and 14 ft/lbs of tq over the stock exhaust system.                    


  • Fits Porsche 991 Carrera 3.4L (With PSE) and Carrera S 3.8L vehicles (With or Without PSE) 2012-2016 (2012 was a split model year, a 2012 911 Carrera could be either a 997.2 or 991, please verify if your car is a 997.2 or a 991 before purchase)
  • Increases power by 16 whp and 14ft/lbs of tq
  • Saves 12 lbs. versus the factory center muffler
  • Non-PSE option comes with complete valve controller kit
  • Dramatic improvement in sports car sound and power throughout the RPM range
  • Constructed from high-quality 14-16 gauge C.N.C. mandrel-bent T304L stainless steel for optimum flow and maximum durability
  • Direct bolt-on replacements for the factory center muffler (3.8L NON-PSE Vehicles include a Valve Controller to operate valves)
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty

NOTE: This Valvetronic Muffler Bypass X-Pipe is compatible with all 991 Carrera 3.8L models With or Without Porsche Sport Exhaust (PSE) but the NON-PSE equipped cars will include a Valve Controller. The 3.4L is ONLY compatible with Porsche Sport Exhaust (PSE) equipped vehicles. If your 991 3.4L is not currently equipped with the PSE system, then you will need to upgrade to our full Porsche 991 Carrera Valvetronic Exhaust System

Click Here For Install Instructions for Porsche Homelink Connection For Valvetronic Exhaust Control


The Porsche Sport Exhaust – better known as PSE – was a factory option available on many late model Porsches. You can quickly and easily determine if your vehicle is equipped with PSE by taking a look at your center console. If your console has a button on it with an “exhaust tip” icon (see photo), then your vehicle is equipped with PSE, and you should select the PSE option when adding this product to your cart. If you do not see this button, the your vehicle does not have PSE and you should select the standard exhaust option when checking out.

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.


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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.