ARP Custom Age 625+ Head Stud Kit for 2009-2025 Nissan GT-R VR38DETT - 202-4305

Material: Custom Age 625 Plus super-alloy

Tensile Strength: Rated at 260,000 psi

Fatigue Resistance: Engineered for superior fatigue-cycle life under extreme cylinder pressure

Corrosion Resistance: Resistant to atmospheric corrosion and oxidation

Manufacturing: Centerless ground and heat-treated before thread rolling and machining

Reusability: Reusable alternative to factory torque-to-yield cylinder head bolts

Fastener Style: Cylinder head studs

Nut Style: 12-point chromoly steel nuts

Stud Design: Non-undercut

Finish: Black

Washers: Hardened, parallel-ground washers included

Brand: ARP

Part Number: 202-4305

SKU: ARP202-4305

UPC: 672036040413

Product Series: Custom Age 625+ Series

Part Type: Cylinder head stud kit

Engine Application: Nissan VR38DETT 3.8L twin-turbo V6

Cylinder Head Location: Head

Fastener Style: Stud

Stud Design: Non-undercut

Head Style: 12-point

Stud Material: Custom Age 625 Plus

Nut Material: Chromoly steel

Fastener Color: Black

Tensile Strength: 260,000 psi

Washers Included: Yes

Assembly Lubricant Included: Yes

Torque Specification: 115 ft-lb with ARP Ultra-Torque Fastener Assembly Lubricant

Quantity: 1 kit

What's Included: One complete Custom Age 625+ head stud kit with studs, 12-point chromoly nuts, hardened parallel-ground washers, and a 0.5 oz pack of ARP Ultra-Torque lubricant

ARP, short for Automotive Racing Products, is an American manufacturer specializing in high-strength bolts, studs and fastener kits for performance engines, drivetrains and racing applications. The company was founded in 1968 by Gary Holzapfel after he recognized that ordinary fastener failures were contributing to damaged race engines. From its beginnings in a small garage, ARP has grown into a major Southern California manufacturer with extensive forging, machining, heat-treating, finishing, testing and packaging capabilities. Its product range includes head studs, main studs, connecting-rod bolts, flywheel bolts, harmonic-balancer bolts, wheel studs and other critical engine and driveline hardware used in street-performance builds and professional motorsports.

For Nissan Skyline GT-R and Nissan GT-R builds, ARP manufactures application-specific fasteners for both the RB26DETT and VR38DETT engines. Available GT-R products include RB26 head studs, main studs, rod bolts and flywheel bolts, along with VR38 head studs, main studs and connecting-rod bolt kits. Depending on the application, ARP fasteners may use premium materials such as 8740 chrome moly, ARP2000 or Custom Age 625 Plus to provide greater clamping strength and fatigue resistance than standard hardware. Whether assembling a rebuilt RB26, upgrading an R32–R34 Skyline GT-R or building a high-horsepower R35 GT-R, ARP fasteners provide engine builders with precision hardware designed for demanding performance applications.

ARP products are covered by the manufacturer’s applicable product warranty. ARP’s public website does not currently provide a universal warranty duration for every fastener or kit, so coverage is reviewed according to the specific product, reported problem and installation circumstances.

Warranty consideration requires the correct ARP kit to be used for the listed application and installed according to the instructions supplied with that kit. Failure to follow the required installation procedure, torque specifications, lubricant requirements or preparation steps may void warranty coverage. Damage caused by incorrect fitment, improper installation, misuse, corrosion, modification, excessive heat or unrelated component failure may not qualify.

To begin a claim, contact Elite GT-R Parts with:

• Your order number and ARP part number
  
• A description of the issue
  
• Clear photographs of the fastener and affected components
  
• Relevant installation and engine-build information
  

Do not return the product before receiving authorization. ARP may require the fastener, packaging and related components to be inspected before determining coverage. Final warranty eligibility and the available resolution are determined by ARP under its current warranty terms.