Chevy SBC 350 EFI 1957-95 Inj Ports HiRise Aluminum Intake Manifold [Black] stable air flow at any

stable air flow at any rpm

If your standard Bowtie block could handle 1500+ HP it would be Speedmaster's H1 engine block

These can be used on std or aftermarket plenum manifolds

but with several important modifications

Injectors come complete and ready for installation with precision molded o-rings and fine-mesh fuel strainers

Chevy SBC 350 EFI 1957-95 Inj Ports HiRise Aluminum Intake Manifold [Black] stable air flow at anyStep up to the high rpm power of an open plenum with Speedmaster HiRise intake manifolds. These cast aluminum manifolds accept square bore carburetors and are pressure tested to ensure maximum performance. They start to make awesome power around 3,000 rpm.