ARP 134-3609 Head Bolt Kit - LS1 Pre-Sept 2003

ARP 134-3609 head bolt kit for early 5.7L LS1 engines using unequal-length main head bolts (typically before September 2003).

This is the early bolt pattern; it is not the later equal-length ARP 134-3610 kit. Check the actual engine block and removed bolt lengths before ordering, as a vehicle build year alone may not establish the required kit.

Supply only. Contact PSI Performance if you need help confirming fitment.