Carburetor Spacer - 4150 2in Open L/W

The Carburetor Spacer – 4150 2in Open L/W is an essential component for carbureted engine builders and hot rod enthusiasts looking to optimize intake manifold performance. This lightweight aluminum spacer sits between your 4150-pattern carburetor and intake manifold, serving as both a thermal barrier and a tuning tool to fine-tune air-fuel mixture delivery. Whether you're running a vintage muscle car, street rod, or performance engine build, a quality carburetor spacer is fundamental to achieving consistent jetting and repeatability across different driving conditions.

Constructed from black anodized aluminum, this 2-inch thick open spacer reduces heat transfer from the intake manifold to the carburetor bowl, preventing fuel boil-off and vapor lock in high-performance applications. The open design maintains unrestricted airflow while the lightweight construction minimizes rotating mass and inertial losses. At just 0.91 lbs, it adds negligible weight while the robust anodized finish resists corrosion and wear in both street and competition environments. The square-bore configuration ensures compatibility with standard 4150 flange carburetors, providing a secure, leak-free seal that maintains precision fuel delivery.

This spacer benefits engine builders, tuners, and enthusiasts who demand reliability and consistent performance from their fuel delivery systems. Two-inch spacers are particularly popular in street applications where thermal isolation matters but full-length manifold runners remain a priority. Installation is straightforward—simply position the spacer between your carburetor and manifold flange, use appropriate carburetor gaskets and studs, and torque to spec. Verify your intake manifold accepts 4150 pattern carburetors to ensure proper fitment before purchase.