Hooker 2288-1HKR Super Comp. Ceramic Engine Swap Header Perfect for use with GM's growing family of Gen III/IV (LS1/LS2/LS6/LS7) engine swap headers Tuned-length primary tubes for maximum exhaust scavenging and velocity Mandrel-bent tubing for smooth exhaust flow Light weight & sturdy 18 gauge tubing Long transition collector for decreased back pressure