ARP High-Strength Head Bolt Kit for GM LS Engines 2004+ – 12-Point Complete Set

ARP Head Bolt Kit - 12pt GM LS 04 & Later is a complete set of high-strength 12-point head bolts engineered to secure cylinder heads on GM LS engines from 2004 onward.

This ARP kit replaces factory head fasteners with purpose-made, high-performance hardware designed for modern LS engines. The kit contains the correct quantity, length, and specification of bolts for GM LS applications introduced in 2004 and later, packaged for convenient installation. Dimensions and weight make it compact for storage and shipping while the components are manufactured to ARP's established quality standards for clamping reliability.

Which engines and model years fit this ARP head bolt kit?

This kit is intended for GM LS-series V8 engines introduced in 2004 and later that use 12-point head bolts. It fits common LS-based applications that require the GM 12pt fastener pattern and lengths included in the kit. Always confirm fitment against your engine build or vehicle service manual before purchase.

• Designed for GM LS engines from 2004 onward
• 12-point head bolt pattern matching factory replacements
• Includes all bolts needed for a single engine head set

How do these ARP bolts improve assembly and durability?

ARP bolts are made from high-strength materials and manufactured to tight tolerances to provide consistent clamping force and fatigue resistance. That stability helps maintain proper head gasket sealing under higher loads and repeated heat cycles compared with standard OEM bolts. Use with the correct torque procedure and, if recommended, ARP fastener assembly lubricant for accurate clamp results.

• High-strength construction for improved clamp consistency
• Precision manufacturing reduces stretch variability during torqueing
• Compatible with typical engine assembly torque and installation practices

What comes in the package and what are the kit dimensions?

The kit ships as a single package containing the full set of head bolts required for one engine’s cylinder heads. Package dimensions and weight are useful for storage and shipping calculations. If you need individual bolt lengths or counts for custom builds, check the included parts list or contact support for detailed specifications.

• Item package dimensions: 8.62 L x 4.21 W x 2.24 H inches
• Package weight: 4.73 pounds
• Item package quantity: 1 complete head bolt set

Can I reuse existing head bolts or should I install a new ARP kit?

Many rebuild and performance protocols recommend replacing head bolts rather than reusing them, especially when moving to higher torque or altered cylinder pressures. This ARP kit gives a fresh set of fasteners built for reliability, removing uncertainty about previous bolt stretch or wear. For best results, follow ARP or engine manufacturer torque and installation guidelines when fitting new bolts.

• Recommended when rebuilding or increasing engine output
• New fasteners remove concerns about prior stretch or fatigue
• Install using specified torque sequence and lubricant

Who is this for: The ARP Head Bolt Kit - 12pt GM LS 04 & Later is aimed at mechanics, engine builders, and performance enthusiasts working on GM LS-series V8s from 2004 onward who want a reliable, high-strength replacement for factory head bolts. It's suitable for stock replacements during a head gasket service, full engine rebuilds, or performance upgrades where consistent clamp force and long-term durability matter.