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!
2X Entries Into Our F80 M3 Sweepstakes
Two required per valve, necessary for use with certain supertech valves
This product was last offered at the strikethrough price on
08-13-2026
Quality retainers from Supertech
Quality retainers from Supertech
Quality retainers from Supertech
Two required per valve, necessary for use with certain supertech valves
Quality retainers from Supertech