ARP M8 X 1.25 X 30 12pt Black Oxide Bolts

This ARP performance fastener, stud, bolt, tool, or assembly is the M8 X 1.25 X 30 12pt Black Oxide Bolts. 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

• Length: 30mm shank suits shallow mounting depths in cylinder heads and manifolds.
• Tensile Strength: 170000 PSI rating withstands extreme vibration and heat cycles.
• 12-Point Head: Allows 50 percent more contact area for precise torquing up to 40 ft-lbs without cam-out.
• Forged from 8740 chrome moly steel heat treated to 170000 PSI tensile strength with black oxide coating.
• Thread Specs: M8 x 1.25 pitch provides exact match for OEM and aftermarket intake ports.
• Black Oxide Finish: Shields against rust and fuel corrosion in engine bays.

Fitment

Specifications

What’s Included

One new ARP hardware kits – other 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.

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• Shop all ARP products
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Frequently Asked Questions

How do I confirm the M8 X 1.25 X 30 12pt Black Oxide Bolts 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 671-1003, 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.