Proflow Carburettor Spacer 2in. Thick, Phenolic/Plastic 4 Port 4150 PFECS200

Proflow Phenolic Carburettor Spacer — 2" Thick, 4-Port, Holley 4150

The Proflow Phenolic Carburettor Spacer is a serious performance upgrade for Holley 4150-equipped engines. Unlike aluminium spacers, the phenolic/plastic construction acts as a thermal barrier between the carburettor and intake manifold, significantly reducing heat soak into the carb. The result is a cooler, denser fuel charge and more consistent power delivery — especially in hot running conditions.

Key Benefits

• Thermal Insulation — Phenolic material blocks heat transfer from the intake manifold, keeping the carb cooler
• Reduced Heat Soak — Cooler fuel charge means denser mixture and improved combustion efficiency
• Improved Air/Fuel Distribution — Extended plenum column promotes even mixture delivery across all cylinders
• Linkage Clearance — Extra height assists with custom throttle linkage setups
• Complete Kit — Gaskets and mounting hardware included for straightforward installation

Specifications

• SKU: PFECS200
• Material: Phenolic / Plastic
• Thickness: 2" (50mm)
• Plenum Design: 4-Port
• Carburettor Fitment: Holley 4150
• Includes: Gaskets & mounting hardware

Applications

Ideal for hot rods, street machines, drag cars, and performance builds running a Holley 4150 carburettor where heat soak is a concern and maximising intake charge density is a priority.