Milltek Sport Audi RS4/RS5 B9 2.9 V6 Turbo Avant (OPF/GPF) Large-Bore Downpipe and De-Cat

Milltek Sport's large-bore downpipe for the Audi RS4/RS5 (B9) 2.9 V6 Turbo, OPF/GPF Models, replaces the factory downpipe with a genuinely larger-diameter, less restrictive design, constructed from T-304 stainless steel throughout for long-term durability. Reducing backpressure at this point in the exhaust system typically delivers one of the most noticeable power and response gains available on a turbocharged platform, particularly when paired with a supporting ECU tune.

This version replaces the factory catalytic converter with a straight-through de-cat pipe, delivering maximum flow and the greatest performance gain of any Milltek downpipe configuration for this platform. Intended primarily for track and off-road use, worth checking local emissions regulations before fitting to a road car, since removing catalytic converter function entirely will affect emissions compliance in most regions.

Why Choose This Downpipe and De-Cat

• Genuinely larger diameter than the factory downpipe, reducing backpressure throughout
• Maximum flow and the greatest performance gain of any Milltek downpipe for this platform
• T-304 stainless steel construction, built for long-term durability
• Particularly effective when paired with a supporting ECU tune

Compatibility

• Audi RS4 (B9) 2.9 V6 Turbo Avant, OPF/GPF Models
• Audi RS5 (B9) 2.9 V6 Turbo, OPF/GPF Models