Open Monday - Friday

Fabspeed Porsche 991 Carrera Valvetronic Center Muffler Bypass X-Pipe (Valved Exhaust Only) (2012-2016)

0 reviews Write a Review
$2,658.95 - $2,889.95
Calculated at Checkout
HP (whp):
TQ (ft/lbs):
WT (lbs):

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 valved system and if your car does not have a driver controlled valved system you can add that functionality with our valve controller. Just select "Standard Exhaust" from the dropdown menu. This exhaust great compliment to either the factory valved 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 when tested on our in-house dynojet.                    


  • Fits Porsche 991 Carrera 3.4L and Carrera S 3.8L vehicles with a stock factory valved exhaust 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
  • The Standard Exhaust option comes with a 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 replacement for the factory valved center muffler 
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty

 Does my car have a valved exhaust:

The easiest way to determine if your 991 is equipped with a factory valved exhaust is to look at the tips. A factory valved exhaust will have a pipe located in each tip outlet. The outer tip will be clamped to the tip pipe, while the inner tip pipe will be floating inside the inner tip. On non-valved cars there is only a single tip pipe that the tips bolt to. 

NOTE: This Valvetronic Muffler Bypass X-Pipe can be only be used cars equipped with a valved factory exhaust.  This system is not compatible with cars that are equipped with a standard non-valved exhaust. It is possible to make a non-valved car into a valved car by upgrading  to our full Porsche 991 Carrera Valvetronic Exhaust System with valve controller.

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




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.