1978-1987 Grand Prix Holley Single Plane EFI Split Design LS1/LS2/LS6 Intake Manifold, Black 300-294BK

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 manifold with AN-8 fuel rails fits Grand Prixs with 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.
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.

Features:

• Maximum performance 4500 Dominator flange race design with hood clearance consideration
• Lighter than other split race intakes
• Split feature making porting efforts easy!
• Captured O-ring seals at head ports and plenum split
• Vacuum Port options include (2) 1/8, (1) 1/4, and (1) 3/8, NPT ports at the carb flange

Specs:

• Barrels:4
• Color:Black
• Construction:Cast
• Engine:GM LS1/LS2/LS6
• Finish:Black
• Flange Style:4500
• Front Height:7.32"
• Fuel System Type:EFI
• Manifold Type:Split Single Plane
• Rear Height:7.32"
• RPM Power Band:2500-7000
• Warranty:Limited 90 Day

Manufacturer Part Number : 300-294BK

Part Notes:

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.