Bomiz BMW F8x M3/M4 Valved Exhaust System**All Bomiz USA orders may be subject to a lead time of up to 2 4 weeks before shipping, while many exhausts are in stock please contact us prior to ordering to confirm availability** Specifications 2. 75" Full SS304 Tubing X Pipe up front to equalize flow and reduce drone H Pipe further back for sound enhancement Electronic Valves for Rapid Open Close Bolts to OEM and Aftermarket Downpipes Custom sized Carbon Fiber Exhaust tips What's Included Full