ARP Custom Age 625+ Cylinder Head Studs (7 Bolt DSM / EVO 4-9) 207-4302

ARP Custom Age 625+ Cylinder Head Studs (7 Bolt DSM / EVO 4-9) 207-4302

A must-have for any motor seeing over 35 psi!

Price: $457.09

Item NumberARP 207-4302
RRP: $613.87 You Save 26%
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ARP's Custom Age 625 Plus material is newly formulated super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness - with complete resistance to atmospheric corrosion and oxidation. ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Best of all, it is less expensive and expected to soon replace MP-35 as the material of choice in the high strength, super-alloy field. Typical tensile strength is 260,000 psi.

Because of the many head lifting issues on 7 Bolt DSM / 4G63 blocks running in excess of 35+ PSI, a stronger stud needed to be manufactured to meet the demands of today's top engine builders and racers alike. No Modification to your cylinder head or block is required as these are a direct drop-in replacement for the OEM head stud!

  • Yield Strength: 235-255,000 PSI
  • Tensile Strength: 260,000 PSI
ARP Custom Age 625 Cylinder Head Studs 7 Bolt DSM EVO 4-9 207-4302 is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Nice Put these in 3 years ago one at a time without removing the head. 3 years of 25 lbs of boost on stock head gasket without a problem.
Date published: 2013-03-07

Are these for 6 bolt or 7 bolt dsm?

Asked by: Chris47
These will fit 7 bolt DSM only, thank you for your inquiry!
Answered by: ccarey
Date published: 2013-02-26

What is the recommended step-up with trq wrench for these bolts? What is the final set trq required with these bolts. I have the cheaper ARP which has a step-up of 40ftlbs - 60ftlbs - then final set trq at 80ftlbs.

Asked by: evo650hp
ARP recommends following the manufacturers recommended torque sequence. Furthermore, you must tighten the nuts in three equal steps to 100 ft lbs with the ARP supplied LUBRICANT. I've linked to the instructions that are typically sent with ARP studs for your convenience.
Answered by: MAPTech
Date published: 2014-04-25
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