Holley® GM LT1 Hi-Ram Lower Intake Manifold Base
Holley® GM LT1 Hi-Ram Lower Intake Manifold Base
Holley® GM LT1 Hi-Ram Lower Intake Manifold Base
Holley® GM LT1 Hi-Ram Lower Intake Manifold Base
Holley® GM LT1 Hi-Ram Lower Intake Manifold Base


Holley® GM LT1 Hi-Ram Lower Intake Manifold Base

Regular price$629.95
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    Compatible: (6.2L)

    2016 - 2023 Chevy Camaro SS

    2014 - 2019 Chevy Corvette Stingray/Grand Sport 

    2014 - 2017 Chevy SS 


    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


    This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

    The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

    • 1965 and older U.S. manufactured California Certified vehicles
    • 1967 and older U.S. manufactured Federally Certified vehicles
    • 1967 and older Foreign manufactured vehicle



    The new Holley EFI Hi-Ram intake provides the ultimate performance with the new GM direct injected Gen V 6.2L LT1 engine. The modular design of this manifold allows easy disassembly for custom porting, multiple tops, or custom induction systems. Each runner has a large radius where it meets the plenum, and optimized taper & cross-sectional area to perform in a wide variety of engine configurations. The optional injector bosses on the intake runners allow increased performance potential by using additional injectors along with the factory direct injection. When you look for the pinnacle of performance, price, and quality, look to Holley EFI.


    • Modular Design w/ Removable Top
    • Overall Height: 13.34” (w/ EFI Top - 95mm or 105mm) – See Drawing
    • A-B Height: 12.10” (w/ Carb Style Top - 2 x 4150 or 2 x 4500) – See Drawing
    • 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

    Brand Holley EFI
    Construction Cast
    Emission Code 3
    Engine GM Gen V LT1
    Finish Satin
    Manifold Type Hi-Ram
    Product Type Intake Manifold Base
    RPM Power Band 3500-8000+
    Type of Component Lower Manifold
    Warranty Limited 90 Day
    UPC 090127730607
    Part Number 300-237


    Install Guide: