RPC phenolic carburettor spacer kits are designed to help improve engine performance by reducing heat transfer between the intake manifold and carburettor. By keeping the incoming air and fuel charge cooler and denser, this spacer can support stronger power delivery and better efficiency, especially in performance and street applications where heat soak can affect consistency.

Made from phenolic resin, this 1/2 inch 4 hole spacer suits Holley 4150 and 4160 style 4 barrel carburettors, as well as AFB 4BBL carburettor flanges. The ported 4 hole design features 1 11/16 inch ports and comes supplied with gaskets and mounting hardware for a straightforward installation. Finished in black and sold individually, it is a practical upgrade for a wide range of compatible carburettor setups.

With its insulated construction and included fitting components, this spacer kit offers a simple way to help manage under bonnet heat while maintaining reliable carburettor performance.

Features & Benefits

• 1/2 inch spacer helps reduce heat transfer from the intake manifold
• Phenolic resin construction supports cooler, denser air and fuel delivery
• 4 hole ported design suits performance tuned carburettor applications
• Fits Holley 4150 and 4160 style 4 barrel carburettors
• Includes gaskets and mounting hardware for easier installation
• Black finish and compact profile suit a neat under bonnet fitment