Holley EFI Holley EFI Lo-Ram Intake Manifold 300-621

Engine Intake Manifold


Modular Lo-Ram EFI Manifold LS1/2/6 Front Feed (cathedral port) cylinder heads

Holley EFI Lo-Ram Intake Manifold; Fits GM Engines w/LS1/2/6 Cathedral Ports Cylinder Heads; Front-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 Front-Feed Plenum Entry
  • Custom Inlet Duct And Throttle Body Placement
  • Fit Under A Stock Or Mildly Modified Hood In The Front-Feed
  • Clears 4Th Gen Camaro/C5 Corvette Cowls/Hoods w/o Modification
  • 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 lower overall height to fit under a stock or mildly modified hood in the front-feed configuration. The 300-621 Lo-Ram front-feed plenum entry was configured to provide a very low profile modular intake manifold suitable for turbocharged or centrifugally supercharged engines. 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


  • 300-621
  • 300-621
  • Holley EFI
  • New


Shipping Information

  • Item Requires Shipping
  • 28.4 lbs.
  • W14.1700” x H9.0600” x L24.8000”

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