BBF Main Bolt Kit - Fits 390-428

The BBF Main Bolt Kit – Fits 390-428 is designed for big-block Ford builders who prioritize reliability and performance. This kit is essential for those working on stock or modified engines, ensuring that the main bolts maintain block integrity under high combustion pressures.

Manufactured from premium alloy steel and heat-treated to precise specifications, this ARP fastener assembly provides the necessary clamping force for both street and competition applications. The design promotes consistent preload across all main caps, which is crucial for preventing micro-movement that can lead to bearing degradation.

Ideal for serious rebuilds, engine swaps, or performance modifications, this kit is compatible with classic big-block Ford engines such as the 390, 406, 410, 427, and 428. Whether for vintage racing or street performance, the ARP main bolts are a reliable choice for enhancing engine longevity.