Chevy BBC 454 Rect Port HiRise Aluminum Intake Manifold [Polished] they yield better fuel distribution

they yield better fuel distribution and ultimately greater horsepower

It is designed to hold the amount of oil that is needed to lubricate the engine when it is running

Increase fuel volume and better fuel distribution with these Speedmaster fuel rails

Nothing lasts forever

Pontiac Firebird

Chevy BBC 454 Rect Port HiRise Aluminum Intake Manifold [Polished] they yield better fuel distributionStep 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.