Description
High-Performance Intake Manifold. The Holley EFI Gen III HEMI Hi-Ram Intake Manifold Base is designed to enhance engine performance by improving airflow. This manifold base serves as a foundation for custom induction systems and is suitable for naturally aspirated, forced induction, or nitrous applications. It is engineered to maximize power output within a wide RPM range, offering excellent compatibility with Gen III HEMI engines.
Construction and Appearance. Constructed from cast aluminum, the manifold features a natural satin finish for a sleek, durable look. It includes large intake ports and a modular design to accommodate various EFI tops. The intake runner length and tapered cross section help optimize airflow, while billet oil fill caps add a refined touch. The included EFI fuel rails are machined for -8 AN O-ring fittings to support high fuel flow with minimal pressure pulsations.
Installation. Installation requires no drilling and is intended for professional or experienced enthusiasts. The manifold base includes large retained O-rings that provide reliable OE-style sealing and are easy to replace during maintenance.
Warranty. This product is backed by a manufacturer’s limited 90-day warranty.
Application. This manifold base fits 2009-up 5.7L HEMI, 2005-2010 6.1L HEMI, and 2011-up 6.4L HEMI engines. It is intended for use on high-performance vehicles requiring superior airflow characteristics and modular EFI customization.
Holley EFI 300-653
CA Residents: WARNING: Cancer and Reproductive Harm
- Fits Gen III Hemi Engines With Large Intake Ports 1.70” Height X 1.88” Wide
- Adds Power To The Gen III Hemi Engine With A Hi-Ram Intake Manifold
- Port For OE Style Manifold Absolute Pressure (MAP) Sensor 1 Or 2 Bar
- Overall Height 11.59”
- Includes EFI Fuel Rails With -8 AN O-Ring Fittings And Large Passages To Accommodate High Fuel Flow And Dampen Pressure Pulsations In The Fuel System
- Manifold Base Available Separately For Custom Induction Systems
- O-Ring Seal To Head Large Retained O-Rings Offer Superior OE Style Sealing And Are Easy To Replace
- Runner Length And The Tapered Cross Section Designed To Perform Well For A Wide Range Of Engine Configurations
- Billet Oil Fill Cap Attractive Low Profile Design
- Cast Aluminum Construction With Natural Satin Or Black Finish
- Works With Gen III Hemi Injectors And Bosch EV-1 Style Injectors
- Cast-In Pads For Adding Nitrous Nozzles
- Positive Crankcase Ventilation (PCV) Ports With Adapter Fittings
- Basic Operating RPM Range 1500-7000 RPM
- Cylinder Head Port Shape Square
- Deck Height 9.25 Inches
- Emission Code 3
- Flange Style EFI
- Front Maximum Height 7.69 Inches
- Fuel Rails Included
- Fuel System Type EFI
- Gasket Or Seal Included
- Grade Type Performance
- Injector Style Provision EV-1 Gen III Hemi
- Manifold Type Hi-Ram
- Material Aluminum
- Plenum Finish Natural
- Port Size 1.70″ X 1.88″
- Rear Maximum Height 7.69 Inches
- Removable Top Lid Yes
- Runner Length 6.65 Inches
- Single Or Dual Plane Type Single Plane
- Style EFI
- Sub Category Cylinder Block Components
- Type Of Component Lower Manifold
- Vacuum Ports Two 3/8″ NPT And One 1/4″ NPT
- Fits 2009-Up 5.7L HEMI, 2005-2010 6.1L HEMI, 2011-Up 6.4L HEMI Engines
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