✓VEHICLE FITMENT: Fits for Chevy Colorado 2007-2012, for GMC Canyon 2007-2012, for Hummer H3 2007-2008, and for Isuzu i-370 2007-2008 with 3.7L 3654cc L5 DOHC naturally aspirated gasoline engines. Please verify year, make, model, trim, and engine before ordering.
✓OE COMPATIBILITY: Replaces OE numbers 16578, 641338, 19280, 12604221, and 12607895. Designed as a direct-fit catalytic converter exhaust manifold for compatible 3.7L L5 applications.
✓SHIPPING NOTICE: Meets federal EPA standards. Not for sale, installation, or use in California, Colorado, New York, or Maine. Orders to restricted states cannot be fulfilled. Please check the vehicle label under the hood before purchase.
✓EMISSIONS SOLUTION: Helps address P0420/P0430 codes related to low catalyst efficiency, clogged converter performance, sluggish acceleration, or increased fuel consumption. Built to help restore smoother exhaust flow and engine performance.
✓PREMIUM MATERIAL & KIT: Built with a heavy-duty 409 stainless steel body, Q235 steel flanges, and ceramic substrate with Pt, Rh, and Pd loading. Includes 1 interface gasket, 1 outlet gasket, 4 10# coarse-thread double-end studs, 4 washers, and 4 nuts for a secure, leak-resistant installation. Circular flange holes are designed for proper alignment, although they may differ from the original square-hole design.