Holley Hi-Ram Lower Manifold – GM LS7

HOLLEY HI-RAM LOWER MANIFOLD – GM LS7

The HOLLEY HI-RAM LOWER MANIFOLD – GM LS7 is a cost-effective, modular cast aluminum intake manifold designed for high-performance naturally aspirated or forced induction GM LS7 engines in the 6.0 to 7.0+ liter range. It offers aggressive race-inspired styling and delivers strong potential for power at 7000-8000+ RPM, making it ideal for drag racing, muscle cars, marine, off-road, and street-rod applications.

Key Features

• Port size: 2.49” height x 1.21” wide
• Standard LS3 molded O-ring mounting flange gasket
• 3/32” round O-ring cord plenum top gasket
• 6.29” runner length with tapered runner cross-section from 4.67 in² to 2.84 in²
• EFI fuel rails machined for -8AN O-ring fittings to support high fuel flow and reduce pressure pulsations
• Modular design accepts a wide range of carbureted and EFI tops for custom induction setups

Fitment

• GM LS7 engines 6.0 to 7.0+ liters
• Suitable for naturally aspirated or forced induction applications

Note: Verify compatibility with your engine and induction system before ordering. Intended for high-RPM performance applications; proper tuning and supporting components are recommended for optimal results.