The new Holley Single-Plane Race intake manifold is designed with maximum performance in mind. Featured is a two-piece split design that provides access for all levels of porting and modification.

With shoulder bolt locators and O-ring seal, disassembly & reassembly is simple and precise. The Ls Race single-plane intake manifold is designed for hi-performance/racing engine applications, 5.3 to 6.2+ liter displacements, N/A or with power adders.

The large volume 4500 plenum and optimized runners provide airflow potential for Hi-RPM engines with max power at 7500-8000+ RPM. The manifold with An-8 fuel rails fits Gm Ls Gen Iii engines with cathedral port heads and has a 4500 Dominator style carb flange for carburetors, EFI throttle bodies, or EFI throttle body elbows, and is configured with a Ls Map sensor port along with other NPT plenum vacuum or air-temp sensor ports.

Features and Benefits:

• Lighter than other split race intakes Split feature making porting efforts easy! Maximum performance 4500 Dominator flange race design with hood clearance consideration Two versions available: EFI type - Billet Fuel Rails and rail mounting hardware included, or Carbureted / Sniper EFI 4500 Tbi style Vacuum Port options include (2) 1/8, (1) 1/4, and (1) 3/8, NPT ports at the carb flange Captured O-ring seals at head ports and plenum split 33 to 50 percent the price of other split race intakes

Associated Comments:

• Includes mounting bolts & washers. Also includes O-ring cylinder head mounting flange gaskets for an OEM style seal.
• Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219. Note: The EFI versions of the Ls Hi-Ram intake manifold and fuel rail are designed to accept Bosch Style Ev-1 or Magneti Marelli Pico fuel injectors.

Details:

• Barrel Quantity: 4.0
• Basic Operating RPM Range: 2500-7500 RPM
• Cnc Ported: No
• Carburetor Flange: Dominator/4500
• Carburetor Quantity: 1.0
• Carburetor Studs Included: No
• Color: Natural
• Construction: Cast
• Cylinder Head Port Shape: Cathedral
• Deck Height: 9.24 Inch
• Egr Port: No
• Engine: Gm LS1/LS2/LS6
• Flange Style: 4500
• Front Maximum Height: 7.32 Inch
• Fuel Injectors Included: No
• Fuel Rail(s) Included: No
• Fuel System Type: Carbureted
• Gasket Or Seal Included: No
• Grade Type: Performance
• Intake Port Gasket(s) Included: No
• Manifold Type: Split Single Plane
• Material: Aluminum
• Nitrous Bung(s) Included: No
• Plenum Finish: Natural
• Rear Maximum Height: 7.32 Inch
• Removable Runners: No
• Removable Top/Lid: No
• Single Or Dual Plane Type: Single Plane
• Throttle Body Bore Diameter: 5
• Throttle Body Gasket Included: No
• Throttle Body Included: No
• Vacuum Ports: Yes
• Warranty: Manufacturer's Limited 90 Day Warranty