Audi S4/S5 B9 Non Sport Diff models - Resonated (Quieter) Cat-Back Exhaust System with Quad GT-90 Cerakote Black Trims BMW > 5 Series > M5 4.4l Twin Turbo Hybrid G90 & G99 (NAS/ROW Spec Vehicles) > 2025 and Later and offer over a 10%

and offer over a 10% increase in overall diameter over the stock tailpipes

with precision jig manufacturing to ensure a perfect fit

integrated plug for harness connection

which in turn opens the door to gains in both power and torque

Audi S4/S5 B9 Non Sport Diff models - Resonated (Quieter) Cat-Back Exhaust System with Quad GT-90 Cerakote Black Trims BMW > 5 Series > M5 4.4l Twin Turbo Hybrid G90 & G99 (NAS/ROW Spec Vehicles) > 2025 and Later and offer over a 10%Our 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