Doug Thorley Headers thy-506y-c Exhaust Header with 3.5" Flange for Toyota Tacoma 2.4L, 2.7L 4 Cylinders 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