Showing 9 products
APR 2.9T ECU UPGRADE AUDI RS4/5 B9
Audi RS4 B9 / RS5 F5 Radiator Kit (OEM IC)
Milltek Cat Replacement Pipes RS4/5 B9 (PRE-GPF)
Milltek Large-Bore Downpipes and Sports Cats RS5 B9
Milltek Cat-back Resonated Polished Tips PRE GPF RS5 B9
QST ECU/TCU Software Audi RS4/RS5 B9
QST have been offering performance ECU software since the early 2000's, developing and offering some of the industries leading ECU and TCU software to our customers. Developed and verified on our in-house MAHA dyno, then verified in the real world with performance timing equipment, we offer a full range of tuning requirements ranging from Stage 1 all the way to Stage 3 with bespoke hardware changed to unlock efficiency.