Exhaust come with valve as standard including our intelligent ECU system which control valve by engine RPM or remote control.
Video Fitted with FI Exhaust System includes:
Catback Valvetronic Muffler
Dual Tips
Please visit http://www.fi-exhaust.com/product/bmw/f20_m135i.html for more product information.
Or, email to [email protected]
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niiiiice sound @_@