Dinan 21-27 BMW M3/M4 (G80/G82/G83) High Flow Middle Exhaust - 3in - Stainless Steel E91 325I The inlets themselves are up

The inlets themselves are up to 160% larger in cross-sectional area than stock and are designed with an advanced dimpled inner surface to reduce frictional losses between the flow and the wall boundary

you can rest assured knowing that fitment is never an issue

IND's Painted Front Reflectors are the perfect solution to remove the unsightly orange reflectors that still make their way onto our cars thanks to the U

Proprietary Module to Handle Valve Control

Dinan 21-27 BMW M3/M4 (G80/G82/G83) High Flow Middle Exhaust - 3in - Stainless Steel E91 325I The inlets themselves are upThis middle exhaust itself removes the hydro formed factory center section from the secondary catalysts back to the axle back, including both resonators, and replaces it with larger 3 inch T304 stainless steel tubing for freer flowing capabilities. In place of the forward factory resonator, Dinan incorporates a beautifully crafted X pipe made from mandrel bent tubing for minimum restriction, unlike stamped X pipes which are commonplace in the market.