12-Valve Cummins ARP625 (Super Alloy) Head Stud Kit
$1,484.01
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Fits: 89-98 (5.9L) 12-Valve Cummins trucks
Stocking item
LONGER LEAD TIME, PLEASE CALL FOR DETAILS.
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 kits come complete with hardened parallel washers for an 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, theres not a 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-treat, which gives them about 1000% (thats ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). You wont find a better quality stud on the market from any other source.
Features:
- Increased Strength
- Increased Reliability
- ARP625 rating
- 260,000 PSI Tensile Strength
- 8740 Chome moly?construction (12-point nuts)
- Hardened Parallel washers
- Includes ARP assembly lubricant
Stocking item
| Weight | 9 lbs |
|---|---|
| Dimensions | 11 × 7.25 × 2.25 in |
1 review for 12-Valve Cummins ARP625 (Super Alloy) Head Stud Kit
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John Calahan (verified owner) –
Called PDD earlier in OCT and they mentioned these 625 studs were three months backordered from ARP. To my surprise the head studs arrived four days after my order in mid OCT versus three months haha. I am accustomed to large Caterpillar and Waukesha industrial engines, so fitment using the “one-for-one” method was tedious, but not a difficult install. Fine quality machining of the components.