Audi RS4 (B9) Pre-GPF Front Downpipe Sports Cat / De-Cat Performance Exhaust

Unlock the soundtrack and flow your Audi deserves with a premium front pipe upgrade for the RS4 B9 2.9 TFSI. Choose between a high-flow sports catalyst or a catless race pipe to release a deeper tone, sharper response and freer breathing from the twin-turbo V6. Built by Cobra Sport for enthusiasts who want more presence, more character and a serious exhaust upgrade on pre-GPF cars.

Why choose this front pipe upgrade

• Transforms the RS4 B9 engine note with a richer, more aggressive tone under load while retaining refinement on a cruise.
• Improves exhaust gas flow for a more responsive feel and enhanced driving engagement.
• Two options to suit your build: high-flow sports catalyst or catless race front section.
• Trusted by our customers and our own workshop team for quality, fit and sound.

Options explained

• Sports catalyst - a high-flow cat that helps maintain a catalyst element while reducing restriction compared to the factory setup. Replaces a factory emissions device and is not EC homologated. This may not meet current emission laws for road use in your territory.
• Catless front section - the most free-flowing option for maximum sound and flow. Sold for motorsport and off road use only worldwide.

Fitment

• For Non-GPF vehicles only - pre-GPF and pre-OPF RS4 B9 models. Please see our alternative listings for GPF-equipped cars.
• All relevant fittings and gaskets are supplied (turbo clamp not included).

Professional fitting

We highly recommend professional installation. Book your fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

What drivers love

• More character from the 2.9 TFSI biturbo without compromising everyday usability.
• Freer-revving feel and a more exciting soundtrack on throttle.
• Quality construction and proven reliability from Cobra Sport.

Important notes

• The de-cat version is sold for motorsport and off road use only worldwide.
• The sports catalyst version replaces a factory emissions device and is not EC homologated. This may not meet current emission laws for road use in your territory.

Media

Exhaust Talk Episode Two - Sports Catalyst vs De-Cat Performance Exhausts

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