Hi-Ram intake manifold with 105mm LS GenIV type throttle body flange type plenum top. A -10AN fuel rail kit is included.

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.

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
The coolant outlet is a standard Chevy thermostat housing flange. and (2) 1/2 NPT and (1) 3/8 NPT coolant ports are provided.
Power Band: 1500-8000 RPM
Black anodized EFI fuel rails are machined for -10AN O-ring fittings and come included with these EFI Hi-Ram kits.
Plenum Top Gasket Type – 3/32” Round O-ring Cord
Cast 356-T6 Aluminum Construction, Natural, Satin As-Cast Aluminum Finish
Requires the use of early type GM or small cap MSD or Holley Distributors. Not compatible with HEI distributors
2.40” tall x 1.60” wide port flange openings, uses Mr. Gasket intake manifold gasket #5817
Throttle Cable Bracket is supplied in the kit
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” deck height Big Block Chevy engines with standard intake flange rectangle-port cylinder heads.
Uses drive by wire or cable actuated GM Gen IV LS 4-bolt throttle bodies
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

Attributes
Basic Operating RPM Range	1500-8000
Brand	Holley
Category	Intake Manifolds
Color	Natural
Country of Origin (Primary)	CN
Emission Code	3, Off Road
Engine	Chevy Big Block V8
Finish	Natural Cast
Fuel System Type	EFI
GTIN	00090127963494
Harmonized Tariff Code (Schedule B)	8409915085
Hazardous Material Code	N
Life Cycle Status Code	Available to Order
Manifold Type	Hi-Ram
Plenum Finish	Natural
Product Type	Intake Manifold
RPM Power Band	1500-8000
SDR Required Flag	N
Throttle Body Bore Diameter	105
Throttle Bore	105, 105
Warning	California Proposition 65, California Proposition 65
Warranty	Limited 90 Day, Manufacturer's Limited 90 Day Warranty