Give your Audi RS4 B9 or RS5 B9 (F5) 2.9 TFSI biturbo a serious performance upgrade with these Endura Motorsport decat downpipes. These downpipes directly replace the original catalytic converters and are manufactured from high-quality T304 stainless steel with handcrafted TIG welds. Thanks to the large 114.3 mm (4.5") design from the turbo, tapering to 76 mm (3"), exhaust gas flow is significantly improved for more power, faster turbo response, and a more aggressive exhaust sound.
On a Stage 1 setup, an average gain of approximately 34 hp is realized. The downpipes fit directly onto the original mounting points and require no modifications during installation.
Advantages
• Ready to mount – 100% OEM fit without modifications
• More power and torque thanks to greatly improved flow
• Average +34 hp on a Stage 1 setup
• Faster turbo response
• More aggressive and deeper exhaust note
• Fully manufactured from T304 stainless steel
• Hand-handled TIG welds for maximum durability
• Large 114.3 mm (4.5") design from the turbo, tapering to 76 mm (3")
• Mounting material included
• Lifetime warranty against manufacturing defects
Contents
• Left decat downpipe
• Right decat downpipe
• Mounting material
Compatibility
Audi RS4 B9 2.9 TFSI Biturbo (Non-OPF)
Audi RS5 B9 / F5 2.9 TFSI Biturbo (Non-OPF)
Important
• Only suitable for vehicles without OPF (Otto Particulate Filter).
• Software adjustment recommended or required after installation to prevent error codes and achieve optimal performance.
• Not street legal in countries/regions with emission or inspection requirements. Only for motorsport and off-road use where permitted.
• This version does not contain catalytic converters (decat version).
Frequently Asked Questions
Does this set fit an OPF version?
No. These downpipes are only suitable for Non-OPF models. Check beforehand whether your vehicle is equipped with an OPF system from the factory.
How much power does this upgrade deliver?
On a Stage 1 setup, approximately 34 hp of extra power is realized on average. The exact result depends on the software and other modifications.
Do I need an ECU tune?
Yes. A software adjustment is strongly recommended to prevent error codes and get the maximum power out of the modification.
Do these downpipes replace the original catalytic converters?
Yes. These downpipes completely replace the original catalytic converters for maximum exhaust flow.
What is the advantage of the larger diameter?
The 114.3 mm (4.5") design directly behind the turbo significantly reduces back pressure, allowing the turbos to operate more efficiently and spool up faster.
