SKU: 200-8598 | UPC: 672036022068
ARP .875in OD x 7/16in ID Insert Washers (10 Pack) for 1997-2007 Chevy LS1 LS2 LS6
These ARP insert washers fill oversized stud holes in GM LS cylinder heads for secure stud seating and even clamp load. Designed for 1997-2004 Corvette LS1, 1998-2002 Camaro LS1, 2004-2006 GTO LS1/LS2, and similar cathedral port LS engines. Hardened steel construction handles high torque and heat cycles in street or race builds.
Key Features
- Exact Dimensions: 0.875in outer diameter x 7/16in inner diameter matches LS head stud holes precisely to prevent movement
- Hardened Steel Build: Resists deformation under 200+ ft-lbs torque for repeated engine disassembly
- 10-Pack Quantity: Covers one full cylinder head stud kit with extras for rebuilds
- ARP Engineering: Tested for racing applications to maintain clamp load over thousands of miles
- Direct Replacement: Works with ARP Pro Series LS head studs for factory-like fit in aluminum heads
Product Notes
- Inspect head stud holes for wear before installation
- Store in dry conditions to prevent corrosion
- Small lightweight parts ship via padded envelope
Installation Notes
- Professional installation recommended.
- Apply ARP Ultra-Torque lubricant to studs and washers per torque sequence
- Compatible with ARP 234-4317 and 234-4320 LS head stud kits
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2004 | Chevrolet | Corvette | LS1 5.7L |
| 1998-2002 | Chevrolet | Camaro | LS1 Z28/SS 5.7L |
| 1998-2002 | Pontiac | Firebird | LS1 Formula/Trans Am 5.7L |
| 2001-2004 | Chevrolet | Corvette | LS6 Z06 5.7L |
| 2004-2006 | Pontiac | GTO | LS1/LS2 5.7L/6.0L |
| 2005-2007 | Chevrolet | Corvette | LS2 6.0L |
Why Choose ARP?
- Decades of motorsport use in NHRA and NASCAR engines
- Materials exceed SAE Grade 8 strength ratings
- Precision machining for zero tolerance fits
Frequently Asked Questions
- Q: Will these fit LS3 rectangular port heads?
A: No, designed for cathedral port LS1 LS2 LS6 heads. LS3 uses different stud spacers - Q: What material are the washers made from?
A: Heat-treated alloy steel with black oxide finish for corrosion resistance and high strength - Q: Does ARP offer warranty on these washers?
A: Yes, lifetime warranty against manufacturing defects when installed per ARP guidelines
Shipping & Handling
- Method: USPS First Class or UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Padded envelope 6in x 4in x 0.5in
- Weight: 0.1 lbs
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