ARP Main Bolt Kits | Multiple Oldsmobile Fitments (185-5001)

The ARP Main Bolt Kit is a high-performance fastener set designed for use in various Oldsmobile engines. Crafted from forged 8740 chromoly steel, these bolts are rated at 180,000 psi, ensuring exceptional strength and durability under demanding conditions. Engineered to meet the rigorous standards of professional engine builders, they feature rolled threads after heat treatment, which significantly enhances fatigue strength—up to 2,000 percent better than standard OEM fasteners. The kit includes bolts with a reduced wrenching head and a large underhead radius, optimizing installation ease and reliability. These main bolts provide a premium replacement option that improves engine integrity and performance, especially in high-stress applications.

Suitable for multiple Oldsmobile models, these ARP main bolts are intended for engine rebuilds, performance upgrades, or replacing worn OEM fasteners. They are designed as direct replacements for factory bolts, ensuring proper fitment and compatibility across a range of engine configurations. Ideal for street, race, or high-performance applications, these bolts help maintain proper cylinder head clamping force and engine stability. Installation involves standard bolt replacement procedures, and the kit typically includes the necessary bolts for a complete upgrade. They are compatible with engines requiring high-strength fasteners to withstand increased power and stress levels.