NXTGEN 4500 Carb – 4150 Manifold Billet Carb Adapter – 2 inch

A carburetor spacer that adapts a 4500 carburetor to a 4150 intake manifold bolt spacing. The Carburetor spacers improves air/fuel distribution by extending the length of the intake mixture column.

  • CNC machined ballnose surface finish
  • Lightweight 3D design combined with billet strength
  • Open plenum internal design on the 1" or 2" adapter
  • Two heights available - 1 and 2 inches


Two internal design styles of spacers are available. The open plenum design increases plenum volume for improved higher rpm results. The external surface is 3D machined to match the internal shape to ensure the best lightweight design while still retaining strength. The Carburettor is a lightweight CNC machined billet aluminium carburetor spacer / adapter that has been proven by engine dyno testing

Design Style
Two design styles available
CNC Machined Ballnose Surface Finish
RPM Results
Open plenum design increases plenum volume
Plenum Design
Open plenum design
Available Heights
1" and 2"