When the 089317 0000 non-resonant cat-back front section is installed on cars with GPF, the GPF must be disabled in the engine control unit (ECU reset) to avoid the check engine light warning signal and also for optimized performance and throttle response. Rear axle system L/R: 089618 0500LR (incl. CE approval) + exhaust pipe set. The original exhaust will have to be cut! It is not necessary to modify the rear apron. Rear axle sports exhaust system, stainless steel, with integrated valves