Chevy SBC 350 B-4.125 M-350 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block ensuring a perfect fit and

ensuring a perfect fit and maximum efficiency

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

stable air flow at any rpm

look no further than Speedmaster

Couple this Hi-Ram intake with the high flowing LS3 style cylinder heads has outstanding potential for naturally aspirated and forced induction applications

Chevy SBC 350 B-4.125 M-350 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block ensuring a perfect fit andIf 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.