ARP M12 ID x 0.86 OD Chamfer Black Washer – Pack of 10

SKU: 200-8448 | UPC: 672036039721

ARP M12 ID x 0.86 OD Chamfer Black Washer Pack of 10 for 1997-2023 GM LS Chevy Corvette Camaro Ford Mustang Dodge Hemi

ARP chamfered black washers provide precise fit for M12 x 1.25 studs in high-performance GM LS engines Corvette Camaro Silverado trucks Ford Mustang Coyote Modular and Dodge Hemi builds. Chamfer edges distribute load evenly to hold stud tension through extreme heat boost pressure and racing demands. Pack of 10 covers full head stud kits rod bolts or main cap sets for reliable clamping.

Key Features

• Exact Dimensions: M12 inner diameter and 0.86 inch outer diameter align perfectly with ARP Pro Series studs to prevent misalignment and ensure secure clamping force.
• Chamfered Edges: Beveled design seats flush against cylinder heads or blocks reducing stress risers for smoother high-torque assembly and operation.
• Black Oxide Finish: Corrosion-resistant coating thrives in oily wet engine bays to prolong washer durability under continuous high-heat exposure.
• High-Strength Steel Construction: Forged 8740 chrome moly alloy steel handles 200000 PSI tensile loads in cylinder head mains and rod applications.
• 10-Pack Quantity: Exact count for LS head stud kits Coyote or Hemi sets eliminates need for individual purchases.

Product Notes

• Verify M12 x 1.25 stud thread on ARP Pro Series head or rod kits before purchase.
• Use ARP Ultra-Torque lubricant on washers for precise torque values and stretch control.
• Store in original packaging away from moisture until engine assembly.

Installation Notes

• Professional installation recommended.
• Torque to ARP published specs using calibrated torque wrench in proper sequence.
• Compatible only with ARP M12 x 1.25 studs and factory matching hardware.

This Part Fits

Year	Make	Model	Submodel
1997-2004	Chevrolet	Corvette	LS1 LS6
1998-2002	Chevrolet	Camaro	LS1 Z28 SS
1999-2013	Chevrolet	Silverado 1500	5.3L LM7 L59
2005-2013	Chevrolet	Corvette	LS2 LS3
1996-2014	Ford	Mustang	4.6L 5.4L Modular
2011-2023	Ford	Mustang	5.0L Coyote
2009-2023	Dodge	Challenger Charger	5.7L 6.4L Hemi

Why Choose ARP?

• ARP hardware powers NASCAR NHRA Top Fuel teams worldwide.
• Every washer undergoes rigorous quality checks for zero defects.
• Precision machined in USA for tolerances under thousandths of an inch.

Frequently Asked Questions

• Q: Will these fit GM LS head stud kits?
  A: Yes designed for ARP LS Gen III IV head studs M12x1.25 in Corvette Camaro Firebird Silverado trucks and similar LS applications.
• Q: What material and finish do they have?
  A: Forged from high-strength 8740 alloy steel with black oxide coating for corrosion protection and lubricity in engine environments.
• Q: What is the warranty and install tip?
  A: ARP offers limited lifetime warranty against manufacturing defects. Install dry or with ARP lube torque in sequence per application specs.

Shipping & Handling

• Method: UPS Ground or USPS Priority
• Availability: In stock – ships same or next business day
• Packaging: Poly bag in 4 x 4 x 1 inch cardboard box
• Weight: 0.1 lbs