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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 - Holley LS 2x4 Dual Plane Intake Manifolds 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.

  • 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.

  • 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 510-300-121

    RPM Range
    Number Of Carbs
    None, For Fuel Injection
    Engine Make/Size
    Chevy LS3
    Cylinder Head Type
    Manufacturer's Part Number:
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