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Holley Hi-Ram Lower Intake Manifold Kit (GM LT1)

$629.95

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LT1 Hi-Ram, Lower Manifold Only w/out Port EFI Provisions. Order Plenum Top Separately.
  • Modular Design w/ Removable Top
  • Overall Height: 13.34" (w/ EFI Top - 95mm or 105mm)
  • A-B Height: 12.10" (w/ Carb Style Top - 2 x 4150 or 2 x 4500)
  • Height at Plenum Flange: 9.44"
  • Port Size: 2.06" High x 1.53" Wide
  • Runner Length: Approx. 6.5"
  • Large Plenum Volume of 549 Cubic Inches (w/ 1 x 95mm or 1 x 105mm Throttle Body Top)
  • Available With or Without Injector Ports in the Runners
  • Intakes w/ Injector Ports Include Fuel Rails w/ Dual Mounting (1.48" or 2.56" O-ring to O-ring injector length)
  • Fuel Rails are Anodized, Laser Etched, and Machined for 8AN O-Ring Fittings at Each End
  • Rear of Plenum Machined for MAP & 3 Vacuum Ports
  • Head Flange has Clearance for Fuel Supply to High Pressure Pump
  • Increased Runner Wall Thickness for Custom Porting at the Plenum to Runner Entry on Each Runner
  • O-Ring Seals at Cylinder Heads & Plenum Top
  • Easy Assembly w/ Top Mounted Screws on Plenum Top (all except front 2 screws)
  • Several Top Options: 1 x 95mm, 1 x 105mm, 2 x 4150, 2 x 4500, or Blank Flange for Custom Throttle Bodies
  • 3500-8000+ RPM Power Band
The versions of the LT1 Hi-Ram intake manifold with port EFI provisions and fuel rails are designed to accept Bosch Style EV-1 or GM LS7 fuel injectors


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  • Model: 300-237
  • FROM: Holley

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we added this on Thursday 31 March, 2016.

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