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SKU: 612-0750 | UPC: 672036015688
ARP 5/16in x 18 - .725in UHL 12pt SS Bolt Kit for 1997-2013 GM LS-Series Engines (5/pkg)
This ARP bolt kit secures rocker arms on GM LS-Series engines with cathedral-port heads from 1997 to 2013. The 5-pack covers one cylinder head and delivers consistent clamping force that exceeds stock hardware limits. Stainless steel construction handles high-heat valvetrain demands in street and race LS builds.
Key Features
- Stainless Steel Construction: Type 304 stainless steel resists rust and holds strength amid oil coolant and combustion exposure
- 12-Point Head Design: Provides secure wrench engagement to prevent stripping during repeated installs and removals
- Exact Sizing: 5/16-18 threads and 0.725 inch under head length ensure drop-in replacement for OEM rocker hold-down bolts
- 5-Piece Kit: Matches quantity for one LS cylinder head order two packs for complete engine rocker arm coverage
- High Load Capacity: Supports valvetrain loads in naturally aspirated boosted and high-RPM LS engine configurations
Product Notes
- Use ARP moly lube or equivalent on threads for proper preload
- Torque in sequence to avoid uneven stress on rocker shafts
- Packaged in protective sleeve to prevent damage in transit
Installation Notes
- Professional installation recommended.
- Torque to 22 ft-lbs dry or 19 ft-lbs with ARP Ultra-Torque lube
- Fits stock GM LS rocker arms and most aftermarket pedestal-mount designs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2004 | Chevrolet | Corvette | Base, Z06 (LS1) |
| 1998-2002 | Chevrolet | Camaro | Z28, SS (LS1) |
| 1998-2002 | Pontiac | Firebird | Formula, Trans Am (LS1) |
| 2004-2006 | Pontiac | GTO | Base (LS1) |
| 2005-2007 | Chevrolet | Corvette | Base (LS2) |
| 2004-2007 | Chevrolet | Corvette | Z06 (LS6) |
| 1999-2007 | Chevrolet | Silverado 1500 | 5.3L LM7, L59 |
| 2007-2013 | Chevrolet | Silverado 1500 | 6.0L LQ4, LY6 |
Why Choose ARP?
- Trusted by NHRA Pro Stock teams for critical engine fasteners
- Cold-forged and rolled threads for consistent preload retention
- ISO-certified manufacturing ensures batch-to-batch reliability
Frequently Asked Questions
-
Q: Do these fit LS2 and LS6 rocker arms?
A: Yes direct replacement for all Gen III/IV LS cathedral-port heads including LS1 LS2 LS6 on cars and trucks -
Q: What stainless steel alloy is used?
A: High-grade Type 304 stainless steel offers excellent corrosion resistance and tensile strength for performance use -
Q: Does ARP provide a warranty on these bolts?
A: Yes limited lifetime warranty covers breakage when installed and torqued to ARP specifications
Shipping & Handling
- Method: UPS Ground / USPS Priority Mail
- Availability: In stock - ships same or next business day
- Packaging: Protective poly bag in 5in x 3in x 1in box
- Weight: 0.15 lbs
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