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Valved Center Muffler Bypass X-Pipe (Valved Exhaust Only)
A Fabspeed’s valved exhaust design: valves open for full flow and an aggressive note, closed for a tone smoother than stock. center muffler bypass X-pipe for the Porsche 991 Carrera 3.4L and Carrera S 3.8L (2012-2016) with a factory valved exhaust. Built from 14-16 gauge CNC mandrel-bent T304L stainless steel, it's a direct bolt-on replacement for the factory valved center muffler, saving 5.4 kg and adding 16whp and 19 Nm of torque. Valves open bring an aggressive, sporty note; closed, a smoother tone than the factory system. Compatible only with cars fitted with the factory valved exhaust.
Frequently asked
Does the Valved Center Muffler Bypass X-Pipe (Valved Exhaust Only) fit my 911 Carrera?
This listing is specific to the Porsche 911 Carrera (991.1). Exact fitment for your year, trim and options is confirmed on your free consult before anything is ordered.
What does the price include?
The delivered price includes the part from Fabspeed USA, freight to Australia, import costs and GST. Enter your postcode to refine delivery; the final figure is confirmed on consult.
How long until it arrives?
Every Fabspeed part is made in-house at Fabspeed USA with about a one-week production lead time, then allow another 3-4 days for delivery to Australia via UPS. That freight is already included in the price.
What's the sound like with the valves open versus closed?
With the valves open you get an aggressive, sporty exhaust note; with them closed it's smoother than the factory system.
How much power does it add?
Fabspeed's dyno testing showed gains of 16 whp and 19 Nm of torque.
What does the Standard Exhaust option include?
If you select Standard Exhaust for a non-PSE valved system, it comes with a complete valve controller kit so you get driver-controlled valve functionality.
Does it save weight?
Yes, this system saves 5.4 kg versus the factory centre muffler.
Which option should I choose?
Check your center console for a button with an exhaust-tip icon. If it's there, your car has PSE, pick that option. If not, pick Standard Exhaust and Fabspeed includes a valve controller kit so you still get driver-controlled valves. This part only fits cars with a factory valved exhaust.
Who installs it?
Rennen Motorsport in Adelaide, or an authorised dealer near you. Fitting it yourself may also be an option depending on the part, so raise it on your consult; professional installation is quoted separately.
Is it covered by warranty?
Fabspeed products carry the manufacturer's warranty, supported locally through Rennen Plus as the Australian principal. See our returns policy.
Can I just buy this outright, or do I need to talk to someone first?
Every enquiry, whether it's one part or a full build, starts with a free consult. We confirm the exact spec for your car before anything is quoted or ordered.
