Speedmaster 1-286-012-01 Fits Chevy BBC 454 B-4.500 Dh-9.800 4-Bolt Billet Main Bare Iron Engine Block

The next level of performance is these cast iron Chevy Big Blocks. Designed to look standard under your bonnet, and work with stock components.Block is ready for the street racer or all out racer with added strength and cubic inches.All the factory flaws redesigned to eliminate all problems, still using water jacket design.Blocks are cast from highest quality high-density iron with extra-thick cylinder walls and decks.The blocks webs are stronger and fitted with billet steel 4-bolt main caps.Ideal for for supercharged, turbocharged and nitrous applications!Features Include: Extra thick cylinder walls & decks, 4 bolt splayed mains, enlarged bosses for offset or oversize lifters; and scalloped water jacket holes for improved cooling.