ARP Nissan VR38 CA625 Head Stud Kit

This ARP performance fastener, stud, bolt, tool, or assembly is the Nissan VR38 CA625 Head Stud Kit for 2009-2010 Nissan GT-R. Confirm the exact engine or vehicle application, thread size, length, material, strength series, included quantity, installation lubricant, tightening sequence, and current ARP torque specification before ordering.

Key Features

• CA625+ Alloy Steel: Forged from proprietary ARP material with 260,000 psi tensile strength for repeated high-stress cycles without fatigue.
• 12-Point Nuts: Zinc-plated steel nuts allow precise wrenching and higher torque values without rounding.
• Hardened Parallel Washers: Included washers distribute load evenly across the head gasket for uniform clamping.
• ARP CA625+ is a premium chromoly alloy steel heat-treated for 260,000 psi tensile and 220,000 psi yield strength.
• Rolled Threads: Increases thread strength by 130% over cut threads to resist stripping and maintain torque under boost.
• CNC machined in the USA with exacting tolerances for every application.

Fitment

Specifications

What’s Included

One new ARP head stud & bolt kit in the exact configuration and quantity identified by this listing. Brackets, wiring, air lines, fittings, switches, fasteners, fitting kits, fluids, covers, and accessories are included only when expressly stated for this exact part.

About ARP

Automotive Racing Products manufactures high-performance studs, bolts, nuts, washers, wheel hardware, assembly tools, and installation lubricants for engine, drivetrain, chassis, and racing applications. Thread dimensions, material, preload method, lubricant, torque, and included quantity remain exact-part specific.

Important Disclosures

• California Proposition 65 warning applies. Review the current manufacturer warning before handling or installation.

Related Parts

• Shop all ARP products
• ARP Nissan VR38 Main Stud Kit
• ARP 01-10 6.6L GM Duramax Diesel Head Stud Kit
• ARP 02-06 Mini Cooper Head Bolt Kit

Frequently Asked Questions

How do I confirm the Nissan VR38 CA625 Head Stud Kit fits my application?
Match the exact engine family or vehicle, component location, thread diameter and pitch, under-head length, material, strength series, and every current ARP application note.

Can I reuse the factory torque value with this ARP hardware?
Not automatically. Use ARP’s current instructions for the exact part, material, lubricant, tightening sequence, and preload method. Factory torque values may be based on different hardware and friction.

What is included with this ARP kit?
Only the studs, bolts, nuts, washers, lubricant, and tools expressly listed for this exact part number are included. Verify the required quantity before disassembly.

Installation Instructions

1. Confirm ARP part number 202-4305, the complete application, and every required supporting component before beginning work.
2. Clean and inspect all mating threads and components, then verify thread engagement, length, washers, nuts, lubricant, and required preparation before assembly.
3. Follow ARP’s current tightening sequence, lubricant instructions, torque or stretch method, and any retorque procedure for this exact part.
4. Verify clearance, preload, fastener seating, and normal component operation before returning the vehicle or engine to service.