Stainless Works Chevy/GMC Truck 1967-87 Exhaust 2.5in Smooth Tube System1967 87 Chevy GMC Truck. Small Block. CNC mandrel bent for optimal flow 304 2 1 2" stainless steel for maximum corrosion resistance. Designed to fit factory 2" manifolds. Dual smooth tube mufflers that lets the truck have an aggressive sound and great thing about this is that the tailpipes exit in stock location behind rear tires. These, kits come with a lifetime warranty and proudly made in the USA This Part Fits: Year Make Model Submodel 1978 1980