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Holley 300-123BK

EFI Hi-Ram Intake For LS1/LS2/LS6 Cathedral Port

Holley 300-123BK

510-300-123BK

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Holley 300-123BK EFI Hi-Ram Intake For LS1/LS2/LS6 Cathedral Port $809.95
EFI Hi-Ram Intake
  • For LS1/LS2/LS6 Cathedral Port
  • Designed for use with 1 x 105mm GM LS Throttle Body, which is sold separately
  • Longitudinal Mount Plenum Top
  • Black Ceramic Coated Finish

  • Holley 300-123BK Details

    LS Modular Hi-Ram Intake

    Specs:
  • Base Plenum Top Mounting Flange Height - 8.42'' to the lifter valley cover flange on engine block.
  • Total Height with 92/105mm EFI Plenum Top - 12.32'' to the lifter valley cover flange on engine block.
  • Runner Length - 6.58'', As-Cast Runner Cross-Sectional Area - Tapered 4.25 in² to 2.53 in²
  • Throttle Body Flange Location, with 92/102mm EFI Plenum Top : Height - 8.42'' (from engine block lifter valley cover flange), Longitudinal Location - 3.84'' (forward from engine block front flange), Angle - 25 deg. (down from vertical)
  • Plenum Top Gasket Type - 3/32'' Round O-ring Cord
  • Mounting Flange Gasket Type - Standard LS3 Molded O-Ring
  • Port Size - 2.49'' Height x 1.21'' Wide

  • Specifications:

    RPM Range
    2500-8500
    Number Of Carbs
    None, For Fuel Injection
    Emission
    Without EGR
    Cylinder Head Type
    Standard
    Usage
    Street/Hi-Performance
    Position
    Lower
    Engine Make/Size
    Chevy LS1/2/6
    Manufacturer's Part Number:
    300-123BK

    Make Your Bad Intentions Known!

    With the aggressive, race-bred style of the Holley GM LS Modular Hi-Ram Intake Manifold there is no hiding what you intend to do! This cast aluminum intake has been designed to be an alternative budget-minded solution to fabricated sheet-metal intakes on extreme performance engines. Intended for use where hood clearance is not a factor this intake features straight 6-1/2'' long runners with an overall height of just over 11'' to produce max power on naturally aspirated or forced induction engines using high flowing cylinder heads at 7,000 to 8,000 RPM! With a modular base design that allows you to use carbureted or EFI systems and choose or fabricate your choice of top plates the Hi-Ram LS intake is perfect for any LS powered drag race, muscle car, marine, off-road, sandrail, pulling truck or street-rod application!

    Specific Dimensions
  • Height (Carbureted or EFI, 2x4V Top Mount & Blank) - 11.08'' to the lifter valley cover flange on engine block
  • Base Plenum Top Mounting Flange Height - 8.42'' to the lifter valley cover flange on engine block
  • Port Size - 2.49'' Height x 1.21'' Wide
  • Mounting Flange Gasket Type - Standard Molded O-Ring
  • Plenum Top Gasket Type - 3/32'' Round O-ring Cord
  • Runner Length - 6.50'', As-Cast Runner Cross-Sectional Area - Tapered 4.25'' to 2.77''
  • EFI fuel rails are machined for -8AN O-ring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi-Ram kits

    Click Here for High-Ram EFI Intake Dimensions

    Click Here for LS Engine Intake Port Types and Dimensions

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