Holley EFI Gen III Hemi Hi-Ram EFI Manifold

2005–2020 Chrysler 300, 2006–2020 Dodge Charger, 2008–2020 Dodge Challenger, 2011–2020 Ram 1500, 2009–2010 Dodge Ram 1500, 2011–2020 Ram 2500, 2009–2010 Dodge Ram 2500, 2011–2020 Ram 3500, 2009 Dodge Ram 3500, 2006–2008 Dodge Magnum, 2006–2020 Dodge Durango, 2018–2020 Dodge Durango SRT, 2006–2020 Jeep Grand Cherokee, 2010–2020 Jeep Grand Cherokee SRT

300-650

Overview:

The Holley EFI Gen III Hemi Hi-Ram EFI Manifold is engineered for high-performance naturally aspirated, forced induction, and nitrous applications within the 5.7 to 7.2+ liter engine range. Designed to maximize power output at high RPMs between 7500 and 8500, this intake manifold is ideal for enthusiasts seeking to unlock the full potential of their Gen III Hemi engines. Its tall, race-inspired Hi-Ram design is perfect for applications where induction system height is not restricted, making it a versatile choice for muscle cars, drag racing, off-road vehicles, and street rods.

Compatible with 2009 and newer 5.7L, 2005–2010 6.1L, and 2011 and newer 6.4L Gen III Hemi engines, this manifold pairs exceptionally well with high-flow cylinder heads to deliver outstanding airflow and power gains. Whether building a naturally aspirated beast or a boosted powerhouse, the Holley Hi-Ram manifold provides a solid foundation for serious performance upgrades.

Key Features:

Designed with precision and performance in mind, the Holley EFI Gen III Hemi Hi-Ram EFI Manifold offers a range of advanced features to enhance engine output and reliability:

• Compatible with Gen III Hemi and Bosch EV-1 style fuel injectors for flexible fuel delivery options
• Positive Crankcase Ventilation (PCV) ports with adapter fittings for proper crankcase ventilation integration
• Modular manifold base available separately, allowing custom induction system configurations
• Large retained O-ring seals provide superior OE-style sealing and easy maintenance
• Optimized runner length and tapered cross-section for broad engine compatibility and improved airflow
• Cast aluminum construction with natural satin or black finish for durability and style
• Includes EFI fuel rails machined for -8 AN O-ring fittings with large passages to support high fuel flow and reduce pressure pulsations
• Port for OE-style Manifold Absolute Pressure (MAP) sensor (1 or 2 Bar) for accurate engine management
• Cast-in pads for nitrous nozzle installation, supporting additional power adders
• Billet oil fill cap with a low-profile, attractive design

Construction & Design:

Crafted from high-quality cast aluminum, the Holley Hi-Ram intake manifold combines strength and lightweight properties essential for performance applications. The manifold’s design features large intake ports measuring 1.70 inches in height by 1.88 inches in width, perfectly matching the large port Gen III Hemi cylinder heads. Its tall Hi-Ram configuration enhances volumetric efficiency at high RPMs, while the tapered runner cross-section and carefully engineered runner length optimize airflow velocity and distribution.

The manifold base is designed to be modular, offering builders and fabricators the flexibility to pair it with a variety of EFI tops or custom induction setups. The inclusion of large O-ring seals ensures a reliable, leak-free connection to the cylinder heads, maintaining consistent performance under demanding conditions.

Installation & Fitment:

This intake manifold is a direct fit for a wide range of Gen III Hemi-powered vehicles, including Ram 1500, 2500, and 3500 models from 2009 through 2020, Chrysler 300 (2005–2020), Dodge Challenger and Charger (2006–2020), Dodge Durango (2009–2020), Dodge Magnum (2006–2008), and Jeep Grand Cherokee (2006–2020). Installation requires standard intake manifold replacement procedures and is compatible with factory fuel injectors and EFI systems designed for Gen III Hemi engines. No major modifications are typically necessary, making it a straightforward upgrade for serious performance enthusiasts.

What's Included:

• Cast aluminum Hi-Ram intake manifold base
• EFI fuel rails with -8 AN O-ring fittings
• Billet oil fill cap
• Adapter fittings for PCV ports
• Retained O-ring seals for manifold-to-head sealing

Ideal For:

The Holley EFI Gen III Hemi Hi-Ram EFI Manifold is perfect for racers, muscle car enthusiasts, and builders seeking maximum power from naturally aspirated, supercharged, turbocharged, or nitrous-assisted Gen III Hemi engines. Its aggressive styling and race-bred performance make it a top choice for drag racing, marine applications, off-road vehicles, sandrails, pulling trucks, track cars, and street rods. If you demand high RPM power and reliable fuel delivery, this manifold delivers a proven solution.

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.