Chevy BBC 454 Oval Port LowRise Aluminum Intake Manifold [Polished] along with optimized winding

along with optimized winding

Impala and Buick Roadmaster

equal-distribution layout produces great midrange torque without compromising top-end power

Speedmaster pinion depth shims allow you to seat your pinion gear perfectly

or another that's set up the same

Chevy BBC 454 Oval Port LowRise Aluminum Intake Manifold [Polished] along with optimized windingThe Speedmaster LowRise Manifolds are our lowest profile manifold and is also the only one that is street legal on pollution controlled vehicles. It is set up to accept a spread bore carb but comes with an adapter plate that permits the use of square bore carbs. To remain street legal with a square bore carb, you must use one that is also approved as street legal for your application.