Carburettor Phenolic 1/2" 4 Hole Spacer Gaskets and Mounting Hardware

1/2" Phenolic 4-Hole Carburetor Spacer with Gaskets & Mounting Hardware for 4150 Square-Bore Manifolds

Engineered for four-hole carburetor patterns on 4150 square-bore manifolds, this Aeroflow 1/2" phenolic spacer acts as a dedicated heat barrier between the intake manifold and the carburetor. The thermoset phenolic material keeps the intake charge cooler and more consistent, delivering a denser air/fuel mixture, sharper throttle response, and reduced vapor lock under hot, demanding conditions.

Beyond temperature control, the spacer increases plenum volume to promote a freer, straighter airflow path. That added volume supports steadier performance during aggressive driving or racing, helping your engine breathe easier from low to high RPM without bogging down or heat soak. The rigid, warp-resistant construction stands up to repeated heat cycles for reliable, mile-after-mile performance.

Designed with compatibility in mind, it accommodates aftermarket or custom throttle cable/linkage setups, providing necessary clearance while preserving a solid, gasket-sealed mounting. Available in multiple heights and in open or ported designs to match your manifold and desired airflow characteristics.

• 1/2" thick phenolic spacer for 4-hole carburetor patterns on 4150 square-bore manifolds
• Improves air/fuel distribution and lowers intake charge temperature for a denser charge
• Reduces vapor lock and increases plenum volume for enhanced throttle response and consistency
• Supports linkage clearance for aftermarket or custom throttle cable setups
• Phenolic material provides superior heat transfer blocking and resists warping through heat cycles
• Available in multiple heights and open or ported designs
• Gaskets and mounting hardware included with all variations

Whether dialing in a street machine or chasing peak performance, this spacer balances airflow, keeps the charge cooler, and simplifies linkage compatibility—without compromising durability.

What’s Included

• Phenolic spacer (1/2" thickness)
• Gaskets
• Mounting hardware