This spacer adapts a Holley 4412 two barrel carb to a 4150 open plenum or dual plane intake. This spacer is designed and CNC machined to achieve the maximum amount of efficiency and horsepower from your engine.
Allows you to move the carb & spacer forward or backwards on the intake for the best results.
Typical Horsepower Gain of 8-20hp.
Material - Aluminum
Holley 2 barrel carb
1" Thick
Machined finish
Produced by Illium Industries