Holley 300-963 Hi-Ram EFI Intake Manifold Kit Big Block Chevy Hi-Ram Intake Manifold with 105mm LS Geniv Type Throttle Body

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 and Benefits:

• 2.40 inch tall x 1.60 inch wide port flange openings, uses Mr
• Gasket intake manifold gasket #5817 Cast 356-T6 Aluminum Construction, Natural, Satin As-Cast Aluminum Finish Throttle Cable Bracket is supplied in the kit Plenum Top Gasket Type - 3/32 inch Round O-ring Cord Power Band: 1500-8000 RPM Requires the use of early type GM or small cap Msd or Holley Distributors
• Not compatible with Hei distributors 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
• The coolant outlet is a standard Chevy thermostat housing flange
• and (2) 1/2 NPT and (1) 3/8 NPT coolant ports are provided
• 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 300-961, 300-963, and 300-964 are designed for 1965 & later 396-502+ Mkiv-Mkvi standard 9.80 inch deck height Big Block Chevy engines with standard intake flange rectangle-port cylinder heads
• 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 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

Details:

• Basic Operating RPM Range: 1500-8000 RPM
• Cnc Ported: No
• Carburetor Studs Included: No
• Color: Natural
• Construction: Cast
• Cylinder Head Port Shape: Rectangle
• Deck Height: 9.8 Inch
• EGR Port: No
• Engine: Chevy Big Block V8
• 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
• Throttle Body Bore Diameter: 105
• Throttle Body Gasket Included: Yes
• Throttle Body Included: No
• Throttle Bore: 105
• Vacuum Ports: Yes
• Warranty: Manufacturer's Limited 90 Day Warranty

Installation Guide: Download PDF

Installation / Product Video: Watch on YouTube

⚠️ California Proposition 65 Warning
California Residents: This product can expose you to chemicals which are known to the State of California to cause cancer or other reproductive harm. Please visit www.p65warnings.ca.gov for more information.