Carb Spacers
Carb spacers fit between the carburettor and intake manifold to change air velocity and spacing for better throttle response and fitment. This range includes tapered high velocity spacers in various heights, open centre spacers, and the base gaskets needed to seal them.
Choice depends on your carburettor flange type. Aeroflow spacers here are built for 4150 or 4500 style flanges, so check which your carb uses before ordering. Base gaskets are matched to flange style too, including open hole and 4-hole designs, plus a turbo flange gasket for T3 single entry applications.
- Tapered high velocity spacers (1" and 2", black or raw finish)
- Open centre and 4-hole carburettor base gaskets
- Carb neck gaskets
- Turbo flange gaskets
Frequently asked questions
How do I know which spacer height to use?
Spacer height is chosen based on the intake runner length and the performance characteristics you're after, with 1" and 2" tapered options available in this range. If you're unsure, match the height to what your current setup or engine builder specifies.
Do I need a new base gasket when fitting a spacer?
Yes, a carburettor base gasket is used both above and below the spacer to seal it against the carb and the intake manifold.
What's the difference between a 4150 and 4500 style flange?
These refer to different carburettor flange bolt patterns and sizes, so you need to match the spacer and gasket to the flange style your carburettor actually has.
What does an open centre spacer do differently to a 4-hole design?
An open centre spacer has one large opening below the carb rather than four separate bores, which changes airflow behaviour compared to a 4-hole base gasket design.
