Carburettor Phenolic 1" Open Spacer Gaskets and Mounting Hardware

Aeroflow 1" Phenolic Open Spacer for Carburettor on 4150 Square Bore Manifolds

Enhance engine response and consistency with this 1-inch phenolic open spacer designed to sit between your carburettor and the intake manifold on 4150 square bore systems. Crafted from thermoset phenolic, it acts as a heat sink that blocks heat transfer from the engine, helping to keep the intake charge cooler for a denser, more stable air/fuel mixture.

Key benefits include reduced vapor lock and smoother air/fuel charging across RPMs, delivering more predictable throttle response. The open design adds plenum volume without compromising airflow, supporting improved low-end torque and mid-range stability while maintaining peak performance at higher revs.

Choose between open or ported variants for precise tuning to your setup. Phenolic construction resists warping through heat cycles, ensuring reliable performance over time. The spacer also provides easier linkage clearance for aftermarket or custom throttle cable configurations, promoting smooth, worry-free operation.

All variations include gaskets and mounting studs, with mounting hardware supplied to simplify installation. Available in different heights to match your setup and in open or ported designs to suit 4150 square bore manifolds.