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Valved Cat-Back Exhaust
Valved cat-back exhaust for the BMW M5 G90 Sedan and G99 Touring, 2024+, replacing the restrictive factory rear section with a high-flow valved design that sharpens throttle response and deepens the twin-turbo 4.4L V8's exhaust note. Built entirely in-house at Fabspeed's Fort Washington, Pennsylvania facility from Bent over an internal mandrel so the tube keeps a constant diameter through the bend, unlike crush-bending. T304L stainless steel with precision CNC-machined flanges and brackets. With the valves closed it stays refined for daily driving and highway cruising; open them and the tone turns deeper and more motorsport-inspired. It's a direct bolt-on replacement using factory mounting locations and compatible with the factory exhaust valve controls, so no cutting, welding, or permanent modification is needed.
Frequently asked
Which cars does the Valved Cat-Back Exhaust fit?
Fits your BMW M5 (G90/G99, 2024+). Fabspeed lists this piece for: BMW M5 G90 Sedan and G99 Touring models (2024+). 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.
Does this work with the factory valve controls?
Yes, it's compatible with the factory exhaust valve controls.
What's the sound like with the valves closed versus open?
Closed, it stays refined and civilized for daily driving and highway cruising; open, the M5 gets a deeper, more aggressive, motorsport-inspired tone.
Is this a bolt-on installation?
Yes, it's a direct bolt-on replacement using the factory mounting locations — no cutting, welding, or permanent modification required.
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.
