ARP 5/16in x 18 – .725in UHL 12pt SS Bolt Kit (5/pkg)

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