ARP 247-4205 12v Cummins ARP625 (Super Alloy) Head Stud Kit
ARP 247-4205 12v Cummins ARP625 (Super Alloy) Head Stud Kit
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- Fits: 89-98 (5.9L) 12v Cummins trucks
- Increased strength
- Increased reliability
- ARP625 rating
- 260,000 psi tensile strength
- 8740 chromoly construction (12-point nuts)
- Hardened parallel washers
- Includes ARP assembly lubricant
ARP Pro Series cylinder head studs are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining, and all ARP 247-4205 Head Stud Kits come complete with hardened parallel washers for even load distribution and accurate torque readings.
It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants. Simply stated, there's no better stud setup on the market today. ARP uses a premium-grade 8740 alloy that is rated far superior to aircraft quality. Then each stud is placed vertically in special racks and precisely heat-treated to 260,000 psi. ARP studs are thread rolled after heat treatment, which gives them about 1000% (that's 10 times) better fatigue strength than those studs that are threaded prior to heat treatment (a very common industry practice). You won't find a better quality stud on the market from any other source.