aFe Twisted Steel Up-Pipe GM Diesel Trucks 01-04 V8-6.6L (td) LB7

Construction: These unique up pipes are constructed of 2″ mandrel-bent 304 stainless steel tubing with a .120″ wall for strength and durability. 2″ Inner Liner Flex Pipes: The down-pipes utilizes heavy duty 2″ flex tubes with internal inner liner. Leak-Free Seal: High quality 3/8″ thick flanges are used for a complete 360 degree sealing surface