Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6-Black 300-226BK
SKU: 57860543427

Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6-Black 300-226BK

Sale price$382.48 Regular price$424.98
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Description

Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6-Black 300-226BKLS1 LS2 LS6 Cathedral Port Carbureted Base Only (Plenum Top Mounting Fabrication Flange Available) The Holley GM LS1 LS2 LS6 Modular Hi Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet metal for high performance applications where induction system height is not limited. Coupling this Hi Ram intake with the high flowing LS1 LS2 LS6 style cylinder heads has outstanding potential for N A and forced induction

LS1/LS2/LS6 Cathedral Port Carbureted Base Only (Plenum-Top-Mounting Fabrication Flange Available)

The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high flowing LS1/LS2/LS6 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. Aggressive, bold, race-bred styling will make bad intentions clear for drag race, muscle car, marine, off-road, sandrails, pulling trucks, track, street-rod applications and more!

NOTES: These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration.

Features:

  • Port Size ? 2.49? Height x 1.21? Wide
  • Mounting Flange Gasket Type ? Standard LS3 Molded O-Ring
  • Plenum Top Gasket Type ? 3/32? Round O-ring Cord
  • Runner Length ? 6.58?, As-Cast Runner Cross-Sectional Area ? Tapered 4.25 in? to 2.53 in?

Specs:

Basic Operating RPM Range 3500-8000Revolutions per Minute
Brand Holley
Carburetor Studs Included No
Color Black
Construction Cast
EGR Port No
Emission Code 4
Engine GM LS1/LS2/LS6
Finish Black
Fuel Injectors Included No
Fuel Rail(s) Included No
Fuel System Type Carb
Gasket Or Seal Included No
Grade Type Performance
Intake Port Gasket(s) Included No
Material Aluminum
Nitrous Bung(s) Included No
Plenum Finish Black
Product Type Intake Manifold Base
Removable Runners No
RPM Power Band 3500-8000 RPM
Single Or Dual Plane Type Single Plane
Throttle Body Included No
Type of Component Lower Manifold
Warranty Limited 90 Day
Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 57860543427

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Reviewed in the United States on May 15, 2026
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Jo Bo
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★★★★★ 5
Saves So Much Time, Perfect Fit On Mercruiser Pre-Alpha Outdrive.
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Rick
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★★★★★ 5
Easy to use
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Steve M.
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★★★★★ 5
Works well. You need to drill a 3/8” hole
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