ARP 234-3724 Head Bolt Kit for CHEVROLET LS Gen III LS Series small block (2003 & earlier). two lengths. ARP2000. 12pt ymm_16 If the car is equipped

If the car is equipped with performance exhaust with electronic valve actuators than actuator set P-HF1006 is required and the Akrapovic sound kit P-HF1003 can not be used

Enjoy superior performance by getting this premium-grade Sniper product that is throughly engineered to help take the performance of your fuel system to the next step delivering unprecedented levels of reliability and strength

which is distinctly different from the X5M with a stock system

Fits Following Engines: 427 Chevy Big Block V8 (Mark I "Z11")

Fits Following Engines: 267 CID Chevrolet Small Block Generation I

ARP 234-3724 Head Bolt Kit for CHEVROLET LS Gen III LS Series small block (2003 & earlier). two lengths. ARP2000. 12pt ymm_16 If the car is equippedChevrolet LS Gen III LS Series small block (2003 & earlier), two lengths, ARP2000, 12pt ,Head Bolt Kit Fits Following Engines: LS Gen III LS Series small block (2003 & earlier)