Chevy LS 6.0L Gen IV B-4.000 M-STD DH-9.240 6-Bolt Billet Main Iron Engine Block Speedmaster's chrome air cleaners not

Speedmaster's chrome air cleaners not only look great

Increase fuel volume and better fuel distribution with these Speedmaster fuel rails

highly specialized silicone magnetic steel cores

A billet yoke can mean the difference between winning and losing

Speedmaster LS dual 4-barrel

Chevy LS 6.0L Gen IV B-4.000 M-STD DH-9.240 6-Bolt Billet Main Iron Engine Block Speedmaster's chrome air cleaners notThe next level of performance are these cast iron Chevy LS blocks. Designed to look standard under your bonnet, and work with stock components. The Speedmaster block is ready for the street racer or all out racer with added strength and cubic inches. All the factory flaws redesigned to be eliminated, while still using the water jacket design. The Speedmaster blocks are cast from high density iron with extra thick cylinder walls and decks.