PRODUCT DESCRIPTION

CID Heads LS3 4.0 4500 EFI Intake Manifold.

The CID Heads LS3 4.0 4500 EFI Intake Manifold is designed for engine applications aiming to make 600+HP using LS3 cylinder heads with a single plane intake. The CID Heads LS3 4.0 BA intake manifold has an overall height of 9.5" and unmatched HP-producing characteristics amongst all cast single plane manifolds. It features a square carb pad designed to suit a 4500 Dominator carburetor or throttle body.

*The roof of the LS3 manifold is designed to line up with the roof of an LS3 cylinder head. The port opening on the manifold is not as tall as a factory LS3 port. Testing has shown that leaving the opening on the manifold at its cast height works best. Enlarging the port opening by dropping the floor at the flange to match an LS3 port will reduce taper in the runner and can harm performance.*

Product Features

•  Fuel-injected version. Comes with - 12 fuel rails and mounting hardware. 
• STD injector location is the lower cast bungs while CNC fuel rail brackets are in stock. An upper fuel injector location can be selected as an option. 
• The CID LS3 4.0 BA intake manifold is designed for 600+ HP street, race, and marine applications.
• Near equal length runners that are 4" in the area at the plenum opening with enough material to increase the area to 5.5" at the plenum
• Designed to fit modified GM LS3 port openings
• Optimized "Line of Sight" runners may require port matching.
• Intake Manifold suits a 9.24" deck block
• Made in Ohio USA
• Manifolds DO NOT come O-Ringed and require "paper" or similar style gaskets. (Not Supplied)
• Made to order and a "Final Sale"

Specifications

• Comes with - 12 fuel rails and mounting hardware. 
• Suits EV1 Long Fuel Injectors
• 4.0" CSA at plenum end of runner
• 9.24"" deck height
• 4500 Carburetor bolt spacing and opening
• 9 1/2" tall. Can be milled down to 9"
• Weighs 25LBS with fuel rails & hardware. 

WHAT'S IN THE BOX

One CID Heads LS3 4.0 4500 EFI One Piece BA Intake Manifold. Comes with fuel rails and mounting hardware. 

*All photos are for illustration purposes only*