Chevy SBC 350 B-4.125 M-350 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block it has a square bore

it has a square bore carb flange instead of a spread bore

measuring 92mm

This is our most popular manifold and is showing up on many performance street machines and street rods

The GM LS3 Modular Ram Air Intake Manifold was designed for high-performance applications where induction system height is not limited

These Speedmaster supercharger manifolds are aluminum constructed and suitable for competition or street use

Chevy SBC 350 B-4.125 M-350 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block it has a square boreIf 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.