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Holley EFI Hi-Ram Intake Manifolds
Intake Manifold, 92mm Throttle Body, 42 lbs./hr. Injectors, EFI Hi-Ram, Throttle Body, Standard Deck, Aluminum, Natural, Chevrolet, Small Block, Kit
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Estimated Ship Date from Texas: Monday 10/19/2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
300-951-42K
Part Type:
Product Line:
Summit Racing Part Number:
HLY-300-951-42K
UPC:
810224691539
Cylinder Head Configuration:
Stock
Fuel Injection Style:
Multi-port
Basic Operating RPM Range:
3,500-8,000
Intake Section Included:
Complete
Throttle Body Bore Size:
95mm
Engine Block Deck Height:
Standard deck
Injectors Included:
Yes
Multi-Port Fuel Rails Included:
Yes
EGR:
No
Aftermarket Fuel Rail Required:
Yes
Throttle Body Included:
Yes
Supplemental Bosses Cast-In:
No
Supplemental Bosses Machined:
No
Runners Included:
Yes
Runners Removable:
No
Plenum Material:
Aluminum
Plenum Finish:
Natural
Base Material:
Aluminum
Base Color:
Natural
Remanufactured:
No
Quantity:
Sold as a kit.
Notes:
Kit includes 42 lb/hr injectors. Longitudinal plenum top with fuel rails machined for -8 AN O-ring fittings.
Holley EFI Hi-Ram Intake Manifolds
Holley offers EFI Hi-Ram intake manifolds for a variety of applications, including many vehicles from the 1950s, '60s, '70s, and '80s with a Chevy small block Gen I engine. Fuel rail kits are provided and have mounting for both long and short type fuel injectors. These manifolds offer the performance potential and the appearance of professionally prepared billet and fabricated racing intake manifolds at the affordable price of a cast-aluminum product. They deliver 21st century performance for the iconic small-block Chevy engine.
* Model 300-950 is of standard Hi-Ram configuration with a "top-feed" plenum and a plenum top designed to accept up to an 105mm Gen IV LS 4-bolt throttle body, including drive-by-wire throttle bodies.
* Model 300-951 is a hood-height friendly Hi-Ram variation which has a "front-feed" plenum and a forward-facing throttle body flange which accepts an up to 95mm LS 4-bolt throttle body, also, including DBW throttle bodies. It's an upgrade replacement for the Holley/Weiand Stealth-Ram intake manifold which was a popular manifold used to significantly improve the performance of 1985-92 GM 5.7L TPI fuel-injected engines. The 300-951 system installs under the OE hood for Gen 1, 2, and 3 Camaros and Firebirds. It should be compatible with most applications with a mild cowl induction hood.
* Uses drive-by-wire or cable-actuated GM Gen IV LS 4-bolt throttle bodies
* Throttle cable bracket is supplied in the kit
* GM Gen IV LS MAP sensor port. Also has provisions for (1) 1/8 NPT, (1) 1/4 NPT, (1) 3/8 NPT fittings to the plenum
* Power band: 1,500-8,000 rpm
* Black anodized EFI fuel rails are machined for -6 AN O-ring fittings and come included with these EFI Hi-Ram kits
* Plenum top gasket type – 3/32 in. 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
* 1.95 in. tall x 1.25 in. wide port flange openings
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