BMW F80/F82/F83 M3/M4 Equal Length Valved Sport Exhaust System TIPS:(4) Brushed Steel (3.5" Outlet) track days

track days

and OEM functionality

sharp overrun snaps

Revised version includes front tailored damper adjuster

Weight Savings: 6

BMW F80/F82/F83 M3/M4 Equal Length Valved Sport Exhaust System TIPS:(4) Brushed Steel (3.5" Outlet) track daysBMW F8X M3 M4 Valved Cat Back Exhaust System Equal Length 2. 75" Mid Section with H Pipe and 3. 5" Axle Back (T304 Stainless Steel or Grade 5 Titanium) Overview The S55 engine powering the BMW F8X M3 and M4 is a performance masterpiece, but its stock exhaust note has long been criticized for excessive rasp and a lack of tonal depth. The Valvetronic Designs Equal Length Valved Cat Back is the definitive solutioneliminating the factory harshness and