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Cat-Back Valved Maxflo Exhaust System
Cat-back Fabspeed's valved exhaust design: valves open for full flow and an aggressive note, closed for a tone smoother than stock. Maxflo exhaust system for the Porsche 992 Turbo, Turbo S and Turbo "50 Years" (2021+), plug-and-play with factory Porsche Sport Exhaust: the factory valved exhaust with a driver-selectable loud and quiet mode. and built around a cast X-pipe with CNC mandrel-bent T304L stainless steel tubing. Fitted with Helical UK aerospace-grade exhaust valves, it saves 4.4 kg over stock; dyno testing on an AWD chassis dyno showed gains up to 48.7whp and 73 Nm of torque, around 55hp at the crank. With PSE on and valves open the tone is deep and aggressive with crisp pops; valves closed, it's quiet and An unwanted droning resonance at certain highway rpm, where exhaust pulses match the cabin's natural frequency.-free.
Frequently asked
Does the Cat-Back Valved Maxflo Exhaust System fit my 911 Turbo S?
This listing is specific to the Porsche 911 Turbo S (992.1). 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.
Will it drone on the highway?
No. With PSE off and the valves closed the tone is quiet and refined, and Fabspeed describes it as completely drone-free for highway cruising.
Does it keep the factory PSE valve function?
Yes, this system is plug-and-play with Porsche PSE and retains full valved functionality, so you still get quiet with PSE off and an open, aggressive note with PSE on.
How much power and weight does it change?
Fabspeed's dyno testing shows gains of +48.7 whp and +73 Nm of torque, about +55 hp at the crank, while the system itself saves 4.4 kg versus the stock exhaust.
Does this work with the stock catalytic converters?
Yes, it's compatible with OEM catalytic converters as well as Fabspeed Sport Cats.
Which option should I choose?
This exhaust bolts to your car's existing tip style, so check whether your 992 has factory Dual or Quad tips before ordering (Fabspeed's fitment guide covers how to tell), the wrong one will not fit. If you're not sure, contact us and we'll confirm it for you — no hesitation, that's what we're here for.
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.
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