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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
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