Allstar Performance Holley 4500 Open Carb Spacer - 1" Thick Helmet Air System Motor 1987-1989 GMC V1500 Suburban

1987-1989 GMC V1500 Suburban

Air Bleed Valve

Rocker Switch

Provides exceptional clarity and no distortion

The CamLock buckle

Allstar Performance Holley 4500 Open Carb Spacer - 1" Thick Helmet Air System Motor 1987-1989 GMC V1500 SuburbanSpecially designed for drag race applications to isolate carburetor from manifold, spacers prevent horsepower robbing heat transfer and increase the distance from the bottom of the carburetor to the manifold plenum for better air flow. Spacers are CNC machined in the U. S. from a polymer compound able to withstand temperatures up to 400F. Available in open or four hole versions for 4150 and 4500 series Holley and Holley style carburetors in 1 2", 1",