Upgrade to 5150's Custom Age 625+ Head Stud Kit Built by ARP!
N55 Engines must be drilled & tapped for proper installation
Upgrade to 5150's Custom Age 625+ Head Stud Kit Built by ARP!
N55 Engines must be drilled & tapped for proper installation
Ditch the Stock Head Bolts for a Set of Head Studs from ARP!
Increase Cylinder Head Clamping Force!
Increase Clamping Force To Stop Cylinder Head Lift!
M7X68MM
This product was last offered at the strikethrough price on
07-06-2026