Audi S4 / S5 (B9) 2018+ High Titanium Performance Valved Exhaust System

This titanium valved exhaust system is engineered to amplify the performance feel of the B9 S4/S5 while maintaining full daily-drivability. Lightweight titanium construction improves flow and reduces system weight, contributing to sharper throttle response. With the valves closed, the tone remains controlled and suitable for refined driving; opening them delivers a louder, more aggressive sound with enhanced clarity. APEX offers this system as a precision-fit upgrade compatible with factory valve electronics.