2000-02 F-Body, LS1, Made from 304 stainless steel, for maximum corrosion resistance. All tubes are CNC mandrel bent for optimal flow. 2-1/2″ stainless steel. Designed to fit factory manifolds and shorty aftermarket headers using factory y-pipes. For off-road use only, no catalytic converters. All TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.