This kit is designed to replace the OEM stock head bolts with ARP heavy duty head bolts. These head bolts are far superior to the OEM head bolts in terms of durability and service life, as they are constructed from a premium grade 8740 chrome-moly steel and heat treated to a nominal tensile strength of 200,000 psi. Threads are rolled after heat treatment to ensure optimum fatigue strength – ensuring that they are fully capable of handling the extra stress of high combustion pressure engines.

Features:

- Forged in-house at ARP using only the highest quality materials.
- Heat – treated to ensure optimum fatigue strength (Using special vertical racks to assure complete 360 degree penetration).
- Threads rolled after heat treatment to provide fatigue strength up to ten times longer.
- Precision CNC milling to an exact specification.
- Specially designed for optimum reliability in every application.
- For Evo models I - IX.

Stock images used. Actual product may vary.