Chevy BBC 454 Rect Port Dominator w/Fuel Rail High Rise Intake Manifold Polished it has a square bore

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

Speedmaster rear-end assemblies are the ultimate solution

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Impala and Buick Roadmaster

Designed for engines producing up to 500hp

Chevy BBC 454 Rect Port Dominator w/Fuel Rail High Rise Intake Manifold Polished it has a square boreThese Shootout Series Manifolds are designed to use a dominator style carburetor. Our single plane big block manifold is now available with Dominator carburetor flange. Dual distributor holddowns. Nitrous injector bosses. Four corner water ports. Available with show polished or satin (unpolished) finish. Fits big block Chevy rectangular port cylinder heads on standard deck blocks.