ARP Pro Series Cylinder Head Bolt Kit 12-Point

The ARP Pro Series Cylinder Head Bolt Kit with 12-point heads gives engine builders a dependable way to clamp cylinder heads. It is also sold as a cylinder head bolt set or head stud and bolt fastener kit. ARP builds it for street performance, racing and heavy-duty applications where stock fasteners can stretch or lose clamping load.

Key Features:

• 200,000 PSI tensile strength: The kits are made from high-strength alloy steel for added clamping capability over many factory bolts.
• 12-point head design: The head gives a secure wrench fit and works well in tight spaces around the cylinder head.
• Precision-machined, rolled threads: Threads are rolled after heat treatment, which improves fatigue strength and gives consistent torque and clamp load.
• Complete kit: Each kit is built for its specific engine application, with the hardware needed to install the heads.
• Made in the USA: ARP has a long-standing reputation for quality control and consistent fastener performance in motorsports and performance engine building.

Proper installation helps the head gasket seal reliably, especially in modified or boosted engines. Use the supplied ARP assembly lube and follow ARP's torque specifications for the best results.