Upgrade your big-block Chevy 454 bottom end with the Speedmaster PCE289.1005 billet steel main caps. Engineered as a direct OEM replacement in a 4-bolt configuration, these caps are machined from billet steel for superior strength and rigidity compared to stock cast units, helping your engine handle increased power and reduced flex under hard use.
Designed to fit OEM 4-bolt Chevy BBC 454 blocks, these main caps offer a straightforward drop-in replacement experience when restoring or building your big-block. Whether you're refreshing a worn engine or fortifying a performance build, Speedmaster's billet steel construction provides the durability and precision your bottom end demands.
MPNPCE289.1005
UPC840136533658
