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Published 2010

311 ARP Head Bolt Section

Dennis Louthan was good enough to share the following information on using ARP head bolts for your R16. Thanks Dennis.

Here are the numbers you wanted:

QuantityPart NumberDescription
9AP5-000-1LBStud 7/16x5.0
1AP5-250-1LBStud 7/16x5.25
10APN12-17/16-20 Black 12pt Nut
10APW1316NWasher 7/16ID 13/16OD Non-Cham

You only need the 5.25 bolt if you are going to use the engine lift bracket on the rear of the head. Otherwise you will need 10 5.0 bolts. When I bought mine they ran $60.40 complete. Do order some of their bolt lube, do not use oil between the nuts and washers....It will make a difference in the torque specs and you have the potential to blow a head gasket.

You can contact ARP Automotive Products directly toll free at 800 826-3045 or on your dime at 805 339-2200. Their FAX is 805 650-0742.
Dennis