Chevy BBC 454 Rect Port MidAir Intake Manifold, Fuel Rails & 1200 Cfm Throttle Body they also provide your engine

they also provide your engine with cleaner air for better performance

Use the stock Quadra-Jet carb or 500-650 cfm vacuum secondary carburetor

Fits big block Chevy rectangular port cylinder heads on standard deck blocks

accurate movements when shifting

as well as 1/3 smaller

Chevy BBC 454 Rect Port MidAir Intake Manifold, Fuel Rails & 1200 Cfm Throttle Body they also provide your engineThese MidAir Series Manifolds includes a 4150 Series 1200 CFM Billet Throttle Body. Our dual plane big block manifold is now available with rectangular ports, Dual distributor hold downs and Four corner water ports. Fits big block Chevy rectangular port cylinder heads on standard deck blocks.