Overview: FLOWTECH's emissions-friendly headers are just the ticket for those who want the best of both worlds - top performance and excellent value. All our Shorty Headers install easily to the factory exhaust system, retaining all stock emissions equipment, and offering maximum horsepower gains plus increased efficiency! Features: Mandrel-bent 1-5/8” diameter 16-gauge stainless steel tubing Designed as a direct fit replacement for OEM exhaust manifolds Offers improved horsepower and torque throughout RPM range Bolts directly to factory head pipe Extra thick 3/8” flanges for a leak-free seal Complete with premium gaskets and hardware Will accommodate all emission control devices Available in Black Ceramic, Polished and Natural Sold as a pair Application: 2007-2014 Toyota Tundra Specs: Brand Flowtech Collector Diameter 2.50 inch Emission Code 4 Header Finish Polished Header Style Shorty Primary Tube Dia. 1-5/8 inch Product Type Headers Tube Material 409 Stainless Steel Warning California Proposition 65