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Holley 300-121 - Holley LS 2x4 Dual Plane Intake Manifolds



Holley 300-121 - Holley LS 2x4 Dual Plane Intake Manifolds
Holley 300-121 - Holley LS 2x4 Dual Plane Intake Manifolds

JEGS Part Number: 510-300-121

LS Multi-Port EFI Dual Throttle Body Intake Manifold
  • LS1/LS2/LS6 ''Cathedral'' Heads
  • 4-Hole Square Bore Pad Design
  • Dual Plane Design
  • Includes Fuel Rails
  • Cast Aluminum Finish

    Holley 300-121 Details

    LS1 / LS2 / LS6

  • Fuel Injection Applications
  • Cathedral Port Runner Design
  • Carb Flange Center-To-Center: 8-5/8''
  • 1-3/4'' Maximum Throttle Blade Bore
  • Fits GM LS Gen 3 engines equipped with LS1/LS2 style cathedral port cylinder heads
  • The 300-121 EFI intake manifold and fuel rail are designed to accept Bosch Style EV-1 or Magneti Marelli Pico fuel injectors. OE LS fuel injectors may not fit properly in the 300-121 intake manifold fuel rail assembly.

  • Holley LS 2x4 Dual Plane Intake Manifolds

    Retro Manifold Styling for Your GM LS Engine!
    Holley LS 2x4 Dual Plane Intake Manifolds have the looks and performance of the muscle car era but offer the technology and reliability of modern LS-Series engines. The LS engine does not have an intake-mounted distributor or water neck clearing the way for straight runner paths to the cylinder heads from a choice of dual carburetors or EFI throttle bodies. The nostalgic appearance reflects the tradition of the 1960's Holley Dual 4160 Induction Systems that competed in the streets, drag races, Trans Am Race Series, and Le Mans.

    Features:
  • Cast Aluminum Construction
  • Powerband: 1500 to 7000 RPM
  • Carb Flange Center-to-Center: 8-5/8''
  • Perfect for Street/Performance, Muscle Car, or Street Rod
  • Mount dual 4160-style carburetors or dual 1000cfm EFI throttle bodies
  • Dual plane design for equal distribution and great midrange torque without compromising top-end power

  • Holley 300-121

    RPM Range
    1500-7000
    Number Of Carbs
    None, For Fuel Injection
    Emission
    N/A
    Usage
    Street/Hi-Performance
    Position
    N/A
    Engine Make/Size
    Chevy LS3
    Cylinder Head Type
    LS3/L92
    EGR
    Without EGR
    Aftermarket Fuel Rail Required
    Yes
    Base Finish
    Natural
    Base Material
    Aluminum
    Basic Operating RPM Range
    1,500-7,000
    Engine Block Style
    Stock/OEM standard deck
    Fuel Rails Included
    No
    Injection Style
    Throttle body
    Injectors Included
    No
    Intake Section Included
    Complete
    Plenum Finish
    Natural
    Plenum Material
    Aluminum
    Quantity
    Sold individually
    Runners Included
    No
    Runners Removable
    No
    Supplemental Boss Quantity
    Eight
    Supplemental Bosses Cast-In
    No
    Supplemental Bosses Machined
    Yes
    Throttle Body Included
    No
    Manufacturer's Part Number:
    300-121
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