Exhaust come with valve as standard including our intelligent ECU system which control valve by engine RPM or remote control.
Video Fitted with Fi Complete Exhaust System includes:
Ultra High Flow Catless Downpipe
Catback Valvetronic Muffler + Quad Tips
Please visit http://www.fi-exhaust.com/product/audi/s4.html for more product information.
Or email to us for inquiry: [email protected]
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Could you do a driving video as I'm very interested in this exhaust for my S4 But need to hear it on a car that is being driven to know for sure