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

highly specialized silicone magnetic steel cores

Speedmaster LS dual 4-barrel

per foot of backlash

Add a cool new look to your ride and lower your curb weight with Speedmaster control arms

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.