1973-82 Corvette Exhaust system - big block-auto trans. All tubes are CNC mandrel bent for optimal flow. Made from 304 stainless steel for maximum corrosion resistance. 2-1/2" exhaust system, Designed to replace factory system and connect to factory correct manifolds. These are TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.