- The coolant outlet is a standard Chevy thermostat housing flange. and (2) 1/2 NPT and (1) 3/8 NPT coolant ports are provided.
- Cast 356-T6 Aluminum Construction, Natural, Satin As-Cast Aluminum Finish
- Power Band: 1500-8000 RPM
- Plenum Top Gasket Type – 3/32” Round O-ring Cord
- 2.40” tall x 1.60” wide port flange openings, uses Mr. Gasket intake manifold gasket #5817
- Uses drive by wire or cable actuated GM Gen IV LS 4-bolt throttle bodies
- Black anodized EFI fuel rails are machined for -10AN O-ring fittings and come included with these EFI Hi-Ram kits.
- Hi-Ram intake manifolds are a cost-effective alternative to fabricated sheet-metal or billet manifolds for high-performance applications where induction system height is not limited
- Throttle Cable Bracket is supplied in the kit
- The Big Block Chevy Hi-Ram manifold is available in either a traditional Hi-Ram 105mm plenum top or with a 2 x 4150 4-barrel throttle body plenum top options
- Requires the use of early type GM or small cap MSD or Holley Distributors. Not compatible with HEI distributors
- 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
- 300-961, 300-963, and 300-964 are 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.
Description
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.
Specifications
| Basic Operating RPM Range | 1500-8000 |
|---|---|
| Carburetor Flange | Square/4150 |
| Carburetor Quantity | 2 |
| Carburetor Studs Included | No |
| CNC Ported | No |
| Color | Natural |
| Construction | Cast |
| Cylinder Head Port Shape | Rectangle |
| Deck Height | 9.8 in |
| EGR Port | No |
| Engine | Chevy Big Block V8 |
| Flange Style | 4150 Square Bore |
| Fuel Injectors Included | No |
| Fuel Rail(s) Included | Yes |
| Fuel System Type | EFI |
| Gasket Or Seal Included | Yes |
| Grade Type | Performance |
| Intake Port Gasket(s) Included | No |
| Manifold Type | Hi-Ram |
| Material | Aluminum |
| Nitrous Bung(s) Included | No |
| Plenum Finish | Natural |
| Removable Runners | No |
| Removable Top/Lid | Yes |
| Single Or Dual Plane Type | Single Plane |
| UPC / GTIN | 00090127963500 |
| Warranty | Manufacturer's Limited 90 Day Warranty |