Holley EFI Gen III Hemi Hi-Ram EFI Manifold

2005–2020 Chrysler 300, 2006–2020 Dodge Charger, 2008–2020 Dodge Challenger, 2006–2020 Jeep Grand Cherokee, 2009–2020 Ram 1500 / 2500 / 3500, 2006–2008 Dodge Magnum, 2009–2020 Dodge Durango

300-651BK

Overview:

The Holley EFI Gen III Hemi Hi-Ram EFI Manifold is engineered to maximize power output on naturally aspirated, forced induction, or nitrous-equipped Gen III Hemi engines ranging from 5.7 to over 7.2 liters. Designed for high-RPM performance, this intake manifold excels in delivering peak power between 7,500 and 8,500 RPM. Its modular base allows for versatile configurations, making it an excellent foundation for custom induction setups favored by builders and fabricators. Whether you're upgrading a muscle car, truck, or off-road rig, the Hi-Ram manifold offers aggressive styling and race-proven performance to elevate your Gen III Hemi engine.

Key Features:

Built to meet the demands of high-performance applications, the Holley Hi-Ram manifold incorporates advanced design elements and quality components:

• O-ring seal to cylinder head with large retained O-rings for superior OE-style sealing and easy replacement
• Cast-in pads for nitrous nozzle installation, supporting nitrous oxide applications
• Cast aluminum construction available in natural satin or black finish for durability and style
• Modular manifold base sold separately, enabling custom induction system builds
• Runner length and tapered cross-section optimized for a broad range of engine configurations
• Includes EFI fuel rails machined for -8 AN O-ring fittings with large passages to support high fuel flow and reduce pressure pulsations
• Compatibility with Gen III Hemi and Bosch EV-1 style fuel injectors
• Positive crankcase ventilation (PCV) ports with adapter fittings for proper crankcase venting
• Port for OE-style manifold absolute pressure (MAP) sensor (1 or 2 bar)
• Billet oil fill cap with a low-profile, attractive design

Construction & Design:

The Hi-Ram manifold is crafted from high-quality cast aluminum, providing a strong yet lightweight solution that withstands the rigors of high-performance use. Its satin or black finish offers corrosion resistance and a sleek appearance under the hood. The intake features large, tapered runners and a cross-section engineered to optimize airflow for both naturally aspirated and forced induction setups. The modular base design enhances versatility, allowing builders to adapt the manifold to custom EFI tops or unique induction configurations.

Installation & Fitment:

This manifold is designed to fit a wide range of Gen III Hemi engines with large intake ports, including 2009 and newer 5.7L engines, 2005 to 2010 6.1L engines, and 2011 and newer 6.4L engines. Installation requires standard intake manifold procedures and is compatible with factory-style fuel injectors and EFI systems. The manifold’s height of 11.59 inches makes it ideal for applications where induction system height is not restricted. It fits a broad spectrum of vehicles including Ram 1500, 2500, and 3500 (model years 2009–2020), Chrysler 300 (2005–2020), Dodge Challenger (2008–2020), Charger (2006–2020), Durango (2009–2020), Magnum (2006–2008), and Jeep Grand Cherokee (2006–2020).

What's Included:

• Holley EFI Gen III Hemi Hi-Ram intake manifold
• EFI fuel rails with -8 AN O-ring fittings
• Billet oil fill cap
• Adapter fittings for PCV ports

Ideal For:

This manifold is perfect for enthusiasts and professional builders seeking to extract maximum power from Gen III Hemi engines in muscle cars, drag racers, street rods, off-road vehicles, marine applications, sandrails, and pulling trucks. Its design supports both naturally aspirated and forced induction setups, making it a versatile choice for high-RPM performance builds where induction height clearance is not a limiting factor.

Holley EFI delivers standalone engine management and EFI systems built for everything from engine swaps to serious horsepower builds. With platforms like Sniper, Terminator X, HP, and Dominator, Holley EFI is aimed at enthusiasts who want modern tuning control, data, and drivability—whether it’s a street car, track car, or full-on race program.