Here's a $4,374 mod for your BMW's performance exhaust system. The new system, is crafted from a heat resistant and lightweight chrome nickel called Inconel allowing the firm's engineer's to reduce the thickness of the tubing. All this from 1.5mm to 0.8mm.

The M Performance Exhaust also comes with perforated inner pipes and polished titanium tips, which are laser engraved with the M logo.Check out the video after the break!