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This ARP performance fastener, stud, bolt, tool, or assembly is the M8 x 1.25 x 38mm Broached 10 Piece Stud Kit. 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
- ARP2000 Alloy Construction: Forged steel with tensile strength over 200,000 psi resists stretch and failure in boosted or high-compression setups.
- Application-Specific Length: 38mm underhead length matches B16A B18C cylinder head height for optimal stretch and clamping.
- Stud-Over-Bolt Design: Pulls evenly on head without damaging block threads unlike bolts that can gall aluminum.
- Broached Hex Drive: 12-point broach ends allow secure wrench grip and prevent stud rotation during torquing for accurate preload.
- Precise Thread Rolling: Rolled threads increase fatigue resistance and ensure consistent torque values across all 10 studs.
- CNC-machined threads and rolled fillets for durability.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| Universal or specification-matched application. Verify every dimension, interface, load or operating requirement, and listing note. | |||
Specifications
| Brand | ARP |
|---|---|
| Manufacturer Part Number | 400-8022 |
| Product Type | Hardware - Singles |
| Condition | New |
| Configuration | M8 x 1.25 x 38mm Broached 10 Piece Stud Kit |
| ARP2000 Alloy Construction | Forged steel with tensile strength over 200,000 psi resists stretch and failure in boosted or high-compression setups |
| Broached Hex Drive | 12-point broach ends allow secure wrench grip and prevent stud rotation during torquing for accurate preload |
| Stud-Over-Bolt Design | Pulls evenly on head without damaging block threads unlike bolts that can gall aluminum |
| Precise Thread Rolling | Rolled threads increase fatigue resistance and ensure consistent torque values across all 10 studs |
| Application-Specific Length | 38mm underhead length matches B16A B18C cylinder head height for optimal stretch and clamping |
| Q | Will this kit work on JDM B16A or B18C engines in swapped vehicles? A: Yes, fits all B16A and B18C DOHC VTEC heads regardless of chassis as long as thread pitch is M8 x 1.25 stock |
| Method | UPS Ground or USPS Priority |
| Availability | In stock - ships same or next business day |
| Packaging | Sealed ARP retail box 6 x 4 x 1 inches |
| Weight | 0.4 lbs |
| Features ARP2000 Alloy Construction | Forged steel with tensile strength over 200,000 psi resists stretch and failure in boosted or high-compression setups |
What's Included
One new ARP hardware - single 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 1/2 x 6.5in Long Broached Individual Stud
- ARP 1/2in -20 12pt Nut (Single Nut)
- ARP 1/2in x 5.250in Long Broached Allen Head Stud (Single Stud)
Frequently Asked Questions
How do I confirm the M8 x 1.25 x 38mm Broached 10 Piece 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
- Confirm ARP part number 400-8022, the complete application, and every required supporting component before beginning work.
- Clean and inspect all mating threads and components, then verify thread engagement, length, washers, nuts, lubricant, and required preparation before assembly.
- Follow ARP's current tightening sequence, lubricant instructions, torque or stretch method, and any retorque procedure for this exact part.
- Verify clearance, preload, fastener seating, and normal component operation before returning the vehicle or engine to service.
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