The Speedmaster PCE287.1025 is a high performance 12-point main bolt kit designed specifically for Chevy Big Block 396 and 454 engines. The 12-point fastener design provides increased wrench engagement and is engineered to deliver reliable clamping force to help keep your main caps securely seated under demanding performance conditions.
This main bolt kit is a direct replacement upgrade over stock hardware, making it a practical choice for engine builders looking to improve fastener integrity during a rebuild or performance build on compatible BBC 396 and 454 applications. Backed by Speedmaster's commitment to performance engine components, this kit is a straightforward addition to your Big Block Chevy build.
