Gibson GP311S-C Ceramic Coated Performance Header Direct Fit No Welding Incl. Flanges/Gaskets Heavy Duty 409L Stainless Mandrel-Bent Tubing with Hi-Temp Coating up to 1300 Degrees Direct Fit bolt-on Replacement, No Welding Required, Uses OEM Style Connections Improved performance and quicker response Will Not Affect the Factory Warranty. Meets EPA and Carb Requirements