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CID Heads - Competition Induction Designs

CID LS3 4.0 4150 Carb BA Intake Manifold 9.24" deck

CID LS3 4.0 4150 Carb BA Intake Manifold 9.24" deck

Regular price $795.00
Regular price Sale price $795.00
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CID Heads BA 4.0 LS3 Intake Manifold.

The CID Heads LS3 4.0 4150 Carb BA 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. 

This version features the same 4500 square carb pad opening as the 4500 version, with 4150 Holley carburetor bolt spacing, and is designed for classes that must retain 4150 bolt spacing.

*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

  • The CID LS3 4.0 BA intake manifold is designed for 600+ horsepower 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 the USA 
  • Manifolds DO NOT come O-Ringed and require "paper" or similar style gaskets. (Not Supplied)
  • Made to order and a "Final Sale" 


  • 9.24" deck height
  • 4150 Carburetor Bolt Spacing - 4500 Opening 
  • 4.0" CSA at plenum end of runner
  • 9 1/2" tall. Can be milled down to 9"
  • Weighs 21 LBS 


One CID Heads LS3 4.0 4150 Carb One Piece BA Intake Manifold

*All photos are for illustration purposes only*

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