Cam Tower Bolt Kit - Mitsubishi 4G63

The Cam Tower Bolt Kit - Mitsubishi 4G63 from ARP is engineered for high-performance engine builders and motorsport enthusiasts who demand reliability under extreme cylinder head load. This precision fastener set replaces factory cam tower bolts with superior materials designed to handle sustained high RPM operation, turbocharging, and forced induction applications. Whether you're rebuilding a street engine or preparing a competition platform, these bolts provide the clamping force consistency required to prevent head lift and maintain gasket integrity.

Manufactured from ARP-grade chromoly steel and finished in black oxide coating, the Cam Tower Bolt Kit features 8mm x 1.25 thread pitch with a 1.575-inch length and 10mm 12-point head design for precise torque application and repeatability. The 12-point geometry distributes load evenly across the head surface, reducing stress concentration compared to standard hex fasteners. Black oxide treatment provides corrosion resistance while maintaining a low-profile appearance in the engine bay. This complete set includes 24 bolts, supplying all cam tower positions for most Mitsubishi 4-cylinder configurations.

Technicians and engine builders working with 4G63 platforms—including stroker builds, turbo upgrades, and high-boost applications—will benefit from the enhanced preload retention and reduced bolt stretch that ARP fasteners deliver. Installation requires proper torque specifications (consult ARP documentation for your specific engine configuration) and a 12-point socket for secure fastening without rounding. These bolts are ideal for engines experiencing cylinder head separation, coolant seepage, or gasket failure under boost, making them a critical reliability upgrade for serious motorsport and street performance builds.