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Holley EFI Releases New Modular Lo-Ram Intakes!

By: Skylar Drake12/02/2019 < Back to Blog Home
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Designed for GM LS Gen III/IV cathedral port engines, Holley's new Modular Lo-Ram intakes are perfect for turbocharged and centrifugally supercharged combinations with tight hood clearances. With a peak power limit of 7000-8000 rpm, this ultra-low design is perfect for that new mighty mouse motor you've been dreaming of! These intake manifolds will work with OE or aftermarket cylinder heads and a 105 mm throttle body such as part # 112-581. 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.


300-620 Top-Feed



The 300-620 top-feed plenum entry configuration is designed to allow the currently available Hi-Ram 105 mm plenum tops 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.
  • Modular design allowing the use of top-feed plenum entry.
  • Top-feed plenum configuration w/105mm long. Mount EFI plenum top - 9.07" overall height (without an intercooler installed)

  • 300-621 Front-Feed



    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.
  • Clears 4th Gen Camaro and C5 Corvette cowls and hoods without modification.
  • Front entry plenum flange allows design & fabrication of special throttle body adapters or inlet ducts for custom installations.
  • High volume fuel rails and mounting hardware included with ¾”-16 o-ring ports (8 AN).
  • Front feed plenum configuration w/105mm throttle body adapter - 6.86" overall height.


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