Optional Headers Are Available For The Slip-On Line, Created To Turn The Exhausts Into Complete Exhaust Systems. Manufactured From High-Grade Titanium, These Superbly Finished Headers Have Larger Tubes To Improve Airflow And Increase Performance To Even Greater Levels, As Well As Impressively Reducing Weight In Comparison To Stock Items. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.