Chevy SBC 400 B-4.125 M-400 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block Speedmaster LS dual 4-barrel

Speedmaster LS dual 4-barrel

As the horsepower in your performance vehicle goes up so does the strength of the read end housing

50 STATE LEGAL

These rods incorporate a special doweled cap for specific cap-to-rod alignment and are profiled with extra clearance for stroker applications

1966-83 trucks and Suburbans

Chevy SBC 400 B-4.125 M-400 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block Speedmaster LS dual 4-barrelIf your standard Bowtie block could handle 1500+ HP it would be Speedmaster's H1 engine block. Design from the ground up based upon your favourite bowtie block with the ability to handle naturally aspirated, supercharged, turbocharged and nitrous applications.