Audi S4/S5 B9 Non Sport Diff models - Non-Resonated (Louder) Cat-Back Exhaust System with Quad GT-100 Cerakote Black Trims BMW > 2 Series > M240i Coupe�� (G42 XDrive - NAS Non OPF/GPF Models Only) > 2022 and Later Designed for PPF models

Designed for PPF models

which further optimizes charge air cooling and detonation control

With proven gains in power and torque

This allows racers to reliably increase boost and advance ignition timing—without using high-octane racing fuel—for power gains of up to 20%

Audi S4/S5 B9 Non Sport Diff models - Non-Resonated (Louder) Cat-Back Exhaust System with Quad GT-100 Cerakote Black Trims BMW > 2 Series > M240i Coupe�� (G42 XDrive - NAS Non OPF/GPF Models Only) > 2022 and Later Designed for PPF modelsOur range of Cat Back systems are perfectly suited to cater for anyone looking to improve their sound and aesthetics, designed as a direct replacement for the original system, available in multiple configurations enabling the owner to choose the increase in volume of their exhaust and or add a more suitably aggressive tone. All our products are made from 304L Aircraft Grade stainless steel. This quality material will ensure that your Cat Back system