Integrated Engineering Valved Catback Exhaust - Audi B9 S4

Give your Audi B9 S4 the exhaust note you want without carrying a separate valve remote. Integrated Engineering's valved catback uses app-controlled valves, so you can open the system for the full note or close it for a quieter cruise from the phone you already carry. Features App-controlled exhaust valves with no separate handheld remote Direct fit at the B9 S4 factory mounting points Manual valve override available when paired with the Pro tier of the Integrated Engineering B9 3.0T tune suite Product Specifications SKU: I00W IEEXCK13 MPN: IEEXCK13 Product: Valved catback exhaust Fitment: Audi B9 S4 3.0T Related Product Recommendation Pair it with the Integrated Engineering B9 3.0T ECU tune suite. The Pro tier unlocks manual valve control. Frequently Asked Questions Does the exhaust use a separate valve remote? No. Valve control runs through the iE app. How do I unlock manual valve control? Pair the exhaust with the Pro tier of the Integrated Engineering B9 3.0T ECU tune suite.