2000 - 02 F - Body, LS1, Made from 304 stainless steel, for maximum corrosion resistance. All tubes are CNC mandrel bent for optimal flow. 2 - 12 stainless steel. Designed to fit factory manifolds and shorty aftermarket headers using factory y - pipes. Includes dual high flow catalytic converters. All TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.