Holley EFI Holley EFI Lo-Ram Intake Manifold 300-620

Engine Intake Manifold


Modular Lo-Ram EFI Manifold LS1/2/6 Top Feed

Holley EFI Lo-Ram Intake Manifold; Fits GM Engines w/LS1/2/6 Cathedral Ports Cylinder Heads; Top-Feed Plenum w/105 mm.; Satin Finish;

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  • For Forced Induction Engines With Peak Power At 7000-8000 Rpm
  • Modular Design Allowing The Use Of The Included Top-Feed Plenum
  • Plenum Mounted Air-To-Water Intercooler In A Top-Feed
  • High Volume Fuel Rails And Mounting Hardware Included
  • 3/4 in.-16 O-Ring Ports 8 AN
The Holley LS1/2/6 Lo-Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) cylinder heads. These intake manifolds will work with OE or aftermarket cylinder heads. The Lo-Ram intake manifolds are designed for forced induction (supercharged or turbocharged) engine applications and the 105 mm throttle body part number 112-581 or similar models. The base intake manifold is designed with a low height to aid the packaging of a plenum mounted air-to-water intercooler in a top-feed configuration. The 300-620 top-feed plenum entry configuration is designed to allow the included Hi-Ram 105 mm plenum top to be fitted to a low-profile base intake manifold. The short runner, low-profile base intake manifold intended for forced induction applications was conceived to package with an air to water plenum mounted intercooler with a shorter overall height than possible with other existing intake manifolds. The fuel rail kits come with two sets of brackets. A set for long (usually standard length) fuel injectors and a set for short (such as Pico, or LS7) fuel injectors.


Cylinder Head Type:Cathedral Port
Engine Make/Size:GM LS1/LS2/LS6
RPM Range:7000-8000
WARNING CA Proposition 65:No


  • 300-620
  • 300-620
  • Holley EFI
  • New


Shipping Information

  • Item Requires Shipping
  • 30.6 lbs.
  • W15.3500” x H14.9600” x L24.2100”

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