Auto Racing Products Main Bolt Kit

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Bulletproof Your Bottom End with ARP Main Bolts

The main caps are the foundation of your engine's rotating assembly. When building a Mopar Small Block or B/RB-Series engine, using inferior main bolts is a risk you cannot afford. This Auto Racing Products (ARP) main bolt kit is designed for 2-bolt main applications, providing the clamping force necessary to keep your crankshaft stable under high-load conditions. Manufactured from 8740 chromoly steel, these bolts are heat-treated to ensure they handle the stresses of high-performance street or racing use.

Key Features and Technical Specs

• Compatibility: Fits Mopar 273, 318, 340, 360, 383, 400, 426, and 440 engines
• Configuration: Designed for 2-bolt main cap setups
• Material: 8740 chromoly steel for superior tensile strength
• Finish: Black oxide coating to prevent rust and oxidation
• Reliability: Prevents main cap walk and bearing failure

Unlike standard factory bolts, ARP fasteners are designed for repeated use and consistent torque readings. The included hex nuts are precision-machined to ensure even distribution of clamping force across the main cap, which is critical for maintaining proper bearing clearance. Whether you are performing a stock rebuild or a high-performance upgrade, this kit provides the foundation your engine needs to survive the toughest conditions. Don't compromise on the heart of your engine; choose the industry-standard for strength and reliability. Find all your essential engine build components at GGCRACING.