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Holley Big Block Chevy Hi-Ram EFI Intake Manifold Base; Satin
Item EK-25-934916
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$899.95
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Product Information
Features, Description, Q&A
Features
- Two point four inches tall by one point six inches wide port flange openings
- Uses Mr. Gasket Intake Manifold Gasket 5817
- Designed for 1965 and later Big Block Chevy engines with standard intake flange rectangle port cylinder heads
- Requires 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 is 1500 to 8000 RPM
- Coolant outlet is standard Chevy thermostat housing flange with two 1/2 inch and one 1 3/8 inch NPT coolant ports
- MAP sensor port fits GM Gen 4 LS MAP sensor with provisions for 1/8 inch, 1/4 inch, and 3/8 inch NPT fittings to the plenum
- Black anodized EFI fuel rails machined for -10 AN O-ring fittings included
- Single plane manifold type
- Includes vacuum ports
Description
HIGH-PERFORMANCE INDUCTION. The Holley Big Block Chevy Hi-Ram EFI Intake Manifold Base; Satin is engineered to deliver exceptional airflow and fuel distribution for high-performance Big Block Chevy engines. It serves as the foundational component for EFI systems, optimizing power delivery and efficiency for 1965 and later 396-502+ MKIV-MKVI standard rectangle port heads. Designed for compatibility with early type distributors, this manifold enhances throttle response and engine performance over a wide RPM range.
CONSTRUCTION AND APPEARANCE. Crafted from durable 356-T6 cast aluminum, the manifold features a natural satin as-cast finish that offers corrosion resistance and a professional appearance. The precision casting process ensures robust structural integrity while maintaining lightweight characteristics essential for performance applications.
INSTALLATION. Installation is straightforward for those familiar with Big Block Chevy engine assembly, requiring no additional drilling or modifications. It is designed to bolt directly onto standard 9.80" deck height engines using compatible early distributor types, ensuring a secure fit with minimal hassle.
WARRANTY. Backed by a manufacturer’s limited warranty that covers the product for 90 days.
Holley 300-961
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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