Chevy BBC 454 Aluminum Valve Covers [Silver] These MidAir Series Manifolds includes

These MidAir Series Manifolds includes a 4150 Series 1200 CFM Billet Throttle Body

allowing it to run cooler and quieter than external units

Designed for engines producing up to 500hp

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

The Speedmaster MidRise Air design features the identical plenum and runner design as the normal MidRise

Chevy BBC 454 Aluminum Valve Covers [Silver] These MidAir Series Manifolds includesCover your valvetrain with a set of Speedmaster cast aluminum valve covers. Their strong die cast aluminum design ensures an excellent gasket seal and dissipates heat better than many other covers. They come in tall and short models, and most include bolt in baffles that can be replaced.