Will not affect the factory warranty. No welding required. Uses OEM style connections. 3/8" Heavy Duty Laser Cut Port Flanges- No Warping or Leaking. Premium Gaskets and Hardware included. Header Features: Short Tube Style Header; Direct Fit, Bolt-On; Heavy duty laser cut flanges; Premium gaskets and all hardware included; No Welding; Attaches to the OEM crossover pipe.