Make your RE 13 slip-on into a full system with this ultra-durable stainless steel head pipe. The RE 13 head pipe has a larger diameter than stock, which equates to more power. TIG welded 304 stainless steel. Larger diameter than stock allowing for more flow. Maximum clearance and seamless fit. Increased horsepower and torque gains. Hand-crafted in the U.S.A. Note: RE 13 head pipes only fit with RE 13 slip-on exhausts. Bill's Pipes do not manufacture their head pipes to fit with any other aftermarket exhaust. Note: Mid pipe included with head pipe.