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You will need to either have your rocker arm pedestals machined/milled or purchase a set of the Modified Rocker Arm Pedestals
For it to be “drop in” on a 12valve
040 (224-3354WR
Enhanced Durability: Constructed from high-quality materials to handle elevated stress
010 (224-3452WR
2001-2016 Duramax Connecting Rod Bolt Kit (230-6301) 1995 You will need to either2001 2016 Duramax Connecting Rod Bolt Kit (230 6301) A premium grade 8740 alloy chrome moly steel is used to manufacture the ARP 230 6301 Connecting Rod Bolt Kit. This material is heat treated to provide a tensile strength in the 200,000 psi range, which is substantially stronger than the OEM bolts. Cycle testing shows ARP High Performance rod bolts to be nearly five times more reliable than stock bolts.