Chevy LS 6.0L Gen IV B-4.000 M-STD DH-9.240 6-Bolt Billet Main Iron Engine Block highly specialized silicone magnetic steel

highly specialized silicone magnetic steel cores

per foot of backlash

It has bendable locking tabs and comes with special high-strength bolts

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

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 highly specialized silicone magnetic steelThe 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.