Doug Thorley Headers thy-515-1-c Smog Legal Header for Toyota Tacoma/4Runner/Tundra/FJ Cruiser 4.0L V6 Made in the USA with limited lifetime warranty Extra thick 14GA tubing and 3/8 inch thick flanges Ceramic coated inside and out Kit includes all required gaskets and/or installation hardware CARB approved, 50 state smog legal