Optional Available Headers From The Finest Stainless Steel Offer An Upgrade To A Full System When Used With The Akrapovic Slip-On Exhaust System. Mandatory Link Pipe For Slip-On Is Needed For Mounting.Let Your Bike Stand Out With More Power, Beautiful Design, And The Unique Akrapovic Sound. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.