Holley Hi-Ram Intake Manifold – 5.7L, 6.1L, 6.4L Hemi

Holley EFI Gen III Hemi Hi-Ram intake manifolds are designed for high-performance applications where induction system height is not a constraint. These manifolds are engineered to enhance your engine’s power with their large intake ports and a modular base design featuring adaptable runner lengths and tapered cross-sections, ensuring optimal performance across various engine configurations. With their aggressive, race-inspired styling, these manifolds make a bold statement, whether in drag racing, muscle cars, marine applications, off-road vehicles, sandrails, pulling trucks, track cars, or street rods. Constructed from cast aluminum, they are available in a natural satin or black finish. You can choose between a 95mm or 105mm LS-style throttle body, or opt for the manifold base alone to create custom induction systems.

Key features and benefits include a modular base design that supports a wide range of EFI tops, making it a versatile foundation for custom setups. The EFI fuel rails are machined for -8 AN O-ring fittings, ensuring high fuel flow and dampened pressure pulsations. These manifolds are suitable for naturally aspirated, forced induction, or nitrous engines within the 5.7L to 7.2+L range, delivering maximum power at 7,500 to 8,500 rpm. They are compatible with Gen III Hemi injectors and Bosch EV-1 style injectors, featuring O-ring seals to the head for superior OE-style sealing and easy replacement. Additional features include a billet oil fill cap with a low-profile design, Positive Crankcase Ventilation (PCV) ports with adapter fittings, a port for OE-style Manifold Absolute Pressure (MAP) sensors (1 or 2 Bar), and cast-in pads for adding nitrous nozzles.