Maximum Clearance, Minimal Heat Transfer When bonnet clearance is tight, you shouldn't have to compromise on thermal management. This ultra-low-profile 1/2-inch (12.7mm) spacer is purpose-built for Holley 350 and 500 CFM 2-barrel applications where traditional tall blocks simply won't fit.
The Composite Advantage Standard alloy spacers are notorious for absorbing engine heat and transferring it straight into your fuel system. To combat this, our spacer is precision 3D printed from an advanced, high-strength Carbon Fibre Nylon composite. This material acts as a heavy-duty thermal shield, physically isolating the carburettor from the hot intake manifold to keep your air/fuel charge cooler and denser.
Performance Upgrades:
Eliminates fuel boiling and reduces heat soak for reliable hot-starts.
Delivers a noticeably sharper and more responsive throttle feel.
Promotes a smoother airflow transition directly into the manifold.
Significantly lighter than cast metal alternatives.
Specifications & Fitment:
Compatibility: Direct fit for Holley 2-Barrel carburettors.
Dimensions: True 1/2" (12.7mm) thickness for restricted engine bays.
Material: Extreme heat-resistant and durable Carbon Fibre Nylon.
Ideal For: Street machines, track and race applications, classic restorations, and custom carb conversions.
What You Need to Know for Installation:
Included: 1 × 1/2" Carburettor Spacer block. (Note: Gaskets and extended mounting hardware are not included).
Setup: Always install using high-quality gaskets on both the top and bottom surfaces.
Prep: Ensure your manifold and carburettor base are perfectly clean and flat prior to assembly.
Mounting: Torque all bolts evenly in a cross-pattern to prevent any vacuum leaks. Always verify throttle linkage operation and final bonnet clearance before running the engine.