IE Valved Catback Exhaust For B9 Audi S4

S4 owners have told iE the same thing for years: they love the exhaust note, but not always the attention it draws — and they don't want to carry a separate remote to manage it. This catback answers both asks with app-controlled valves: open them for the full note, close them for a quiet cruise, no extra hardware to keep track of.

FEATURES

APP-CONTROLLED, NOT REMOTE-CONTROLLED

Most valved systems ship with a garage-door-style clicker. iE's runs entirely from the iE app already on the driver's phone — one less thing to lose, one less thing to charge.

MANUAL OVERRIDE, UNLOCKED BY THE TUNE

Pair with the Pro tier of iE's B9 3.0T tune suite and take full manual control of the valves, on demand, instead of living inside a fixed factory drive-mode logic.

BUILT TO SEAL, NOT JUST BOLT ON

Engineered to the B9 S4's factory mounting points so it seals correctly and installs clean the first time — not a universal-fit compromise.