SKU: AFR4450
MPN: 4450
The 1in Phenolic 4150 Carb Spacer Open Clover from Air Flow Research is an essential component for high-performance carburetor tuning and engine optimization. Designed for serious enthusiasts and professional mechanics building modified engines, this spacer sits between your carburetor and intake manifold to fine-tune air and fuel dynamics.
Constructed from phenolic material, this 1-inch spacer provides superior thermal insulation compared to aluminum alternatives, reducing heat transfer from the intake manifold to the carburetor bowl and fuel charge. The 4150 flange pattern ensures compatibility with virtually all Holley 4150-style carburetors, making it a versatile choice for both street and racing applications.
This spacer is ideal for carbureted engines where intake temperature control directly impacts fuel vaporization, cold-start performance, and part-throttle drivability. The open clover design optimizes airflow distribution and promotes even mixture delivery across all cylinders, enhancing combustion efficiency and engine responsiveness.
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