Audi RS4 B9 Performance Parts & Upgrades

• Audi RS5 B9 (F5): same 2.9 TFSI V6
• Audi RS4 B8: the 4.2 V8 car before it
• Audi RS4 B7
• Audi RS3 8V (facelift)
• Audi RS Q3 F3
• View all brands

• Intercoolers: APR air-to-water intercooler system and Wagner Tuning Competition water-to-air intercooler kits.
• Cooling: Wagner Tuning radiator kits, including one made to suit the factory intercooler, and a combined intercooler and radiator package.
• Exhaust: Scorpion 70mm downpipes.
• Suspension: Öhlins Road & Track coilovers and EDC cancellation kit, HARDRACE 32mm front and 25.4mm rear sway bars, rear toe and camber kits, stabiliser links and a rear subframe insert.
• Brakes: Paragon 2-piece rotors, 375 x 36mm front and 330 x 22mm rear.

• Steel or ceramic brakes: the RS4 B9 was offered with ceramic brakes. Paragon rotors replace the standard steel rotors, so check which brakes your car has before ordering.
• Pre-facelift or facelift: the rotors and most engine and suspension parts here suit both, but check the title if you have a 2020-on car.
• Radiator and intercooler: Wagner sells its radiator kit in two versions. Pick the one that matches the intercooler you have or plan to fit.

Have a qualified workshop fit engine, turbo, suspension and brake parts. Intake, intercooler, downpipe and fuel upgrades usually need a tune to suit. Get a wheel alignment after any suspension change, and bleed and road-test the brakes after brake work.