This is a drag race only carburetor spacer, 2 inches thick, molded from gray plastic in an open (no divider) plenum style for high flow.
Spec Sheet: Allstar Spec Sheet
Compatibility
Built for 4150-style square bore carburetors. This is not compatible with 4500/Dominator flange carburetors. Labeled by the manufacturer for drag race use only.
FAQ
What carburetor flange does this spacer fit?
It fits 4150-style square bore carburetors. It is not compatible with 4500/Dominator flange carburetors.
How thick is this spacer?
It is 2 inches thick.
What does "open" style mean?
Open style means the spacer has no center plenum divider, unlike the 4-hole style version.
Is this street legal?
No, this spacer is labeled by the manufacturer for drag race use only.
How does this differ from ALL25980 and ALL25981?
This spacer is 2 inches thick. ALL25980 is the same open style at 0.5 inch thick, and ALL25981 is the same open style at 1 inch thick.

