ARP Custom AGE 625 PLUS Head Stud Kit For ALL 4-Stroke 1.8L Yamaha

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Product Overview

Custom AGE 625

"This 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+. [...] expected soon to replace MP-35 as the material of choice in the high strength, super-alloy field. Typical tensile strength is 260,000-280,000 psi." -ARP

Kit includes:

  • 10 head studs made of Custom Age 625 Plus
  • 10 washers
  • 10 nuts
  • lubricant

Torque to 100lbs.


  • ALL 4-stroke 1.8L Yamaha jet ski


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