GM OEM LS1/LS2/LS6/LS7 Cylinder Head Bolt Kit.

Stock Replacement GM LS1 Head Bolts For Customers Changing Cylinder Heads!  If you are using a conventional LS1 or LS6 block manufactured before May 2004 you will need the long and short head bolts (p.n. 28-12498545).  If you are using an LS2 block or any LSx-based block manufactured after May 2004 you will need the revised short head bolts (p.n. 17800568).  Be sure you verify which head bolts you need before ordering!  Feel free to give us a call with any questions or concerns.