JSP BILLET OVERSIZED EXHAUST FLANGE

Introducing our oversized billet exhaust flange maximizing flow and creating more HP. D style port match to cylinder. Do to poorly drilled OEM castings (causing alignment to be different cylinder to cylinder) we recommend blending port sides to match the flange and leaving a reversion step on the roof and floor of the cylinder to see maximum gains. only if cylinder is off of bike Includes cylinder to flange O-ring