Holley 300-961 Hi-Ram Base, Big Block Chevy

Holley Hi-Ram EFI intake manifolds are now available for 1965 & later 396-502+ MKIV-MKVI Big Block Chevy engines with standard intake flange rectangle-port cylinder heads. Traditional Big Block Chevy engines can now also be fitted with the Holley Brand Hi-Ram type EFI intake manifolds that have so well served GM LS & LT, Gen 3 Hemi, SBF Ford, and Ford Coyote engine platforms. The iconic Chevy SBC & BBC platforms are primed for 21st century induction systems, Holley EFI engine management, and Holley fuel systems. Features:

2.40” tall x 1.60” wide port flange openings, uses Mr. Gasket intake manifold gasket #5817

Designed for 1965 & later 396-502+ MKIV-MKVI standard 9.80” deck height Big Block Chevy engines with standard intake flange rectangle-port cylinder heads.

Requires the use of early type GM or small cap MSD or Holley Distributors. Not compatible with HEI distributors

Cast 356-T6 Aluminum Construction, Natural, Satin As-Cast Aluminum Finish

Power Band: 1500-8000 RPM

The coolant outlet is a standard Chevy thermostat housing flange. and (2) 1/2 NPT and (1) 3/8 NPT coolant ports are provided.

MAP sensor port is for a GM Gen IV LS MAP sensor, manifold also has provisions for (1) 1/8 NPT, (1) 1/4 NPT, (1) 3/8 NPT fittings to the plenum

Black anodized EFI fuel rails are machined for -10AN O-ring fittings and come included with these EFI Hi-Ram kits.