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Sport Cat Downpipes

Fabspeed's Sport Cat Downpipes replace the restrictive factory 800-cell catalytic converters on the RS6/RS7 (C8) with German-imported HJS 200-cell A catalytic converter coating using three precious metals for durability and flow, rather than the cheaper single or dual-metal coatings used in lower grade cats. catalysts, engineered not to trigger a check engine light (US cars). Since the RS6/RS7's factory exhaust is otherwise free-flowing, the cats are the main restriction, and replacing them brings out much more of the 4.0L V8's voice: louder, sharper pops, bangs and crackles with no interior An unwanted droning resonance at certain highway rpm, where exhaust pulses match the cabin's natural frequency.. Fabspeed's in-house dyno testing showed gains of 21whp at the wheels (25hp at the crank) and 42 ft-lbs of torque, along with faster turbo spool and reduced lag. Built from Bent over an internal mandrel so the tube keeps a constant diameter through the bend, unlike crush-bending. 14-16 gauge T304L stainless steel, it's a direct bolt-on replacement for the factory downpipes.
Frequently asked
Which cars does the Sport Cat Downpipes fit?
Fits your Audi RS6/RS7 (C8) (2019+). Fabspeed lists this piece for: Audi RS6 / RS7 (C8) (2019+). 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.
How much power does it add?
Fabspeed's dyno testing showed gains of 21whp at the wheels (25hp at the crank) and 42 ft-lbs of torque.
Will it trigger a check engine light?
No, Fabspeed guarantees no check engine light on US cars with these Sport Cat Downpipes.
How does it change the sound?
It brings out more of the 4.0L V8's voice, with louder, sharper pops, bangs and crackles and no interior drone.
What are the cats made from?
German-imported HJS 200-cell tri-metallic catalytic converters, built for high flow without sacrificing emissions scrubbing.
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.





