This is the exhaust manifold pipe seal for many different GM vehicles from 1992-2009. This gasket goes between the exhaust manifold and the exhaust pipe to seal it. Your vehicle might need 2 of these for the complete exhaust system. This is for Chevrolet Kodiak and GMC Topkick C4500 and C8500 from 2003-2009, and Kodiak/Topkick C6500 and C7500 from 1999-2009. This is also used on 1992-1996 Chevrolet Corvette base coupe and convertible models. This has an inside diameter of 2.5". Replace your old, rusty, leaking gasket with this brand new factory original part from GM at a fraction of the dealer price.

New. Never Installed. OEM part. Bulk Overstock

GM part # 15090919

Alternate GM part # 15170285

Item is number 1 in the GM diagram