1In Phenolic Carb Space r - Open R9136

A quality carburetor spacer is essential for optimizing your intake manifold's thermal and volumetric efficiency. Phenolic material provides superior insulation compared to aluminum, reducing heat transfer from the engine block to the carburetor and fuel system—critical for preventing fuel vaporization and maintaining consistent jetting in high-performance applications. This open-design spacer increases plenum volume for smoother air distribution, making it an ideal upgrade for naturally aspirated engines seeking reliable power gains and improved drivability.

• 1 inch thick phenolic
• Square bore compatible
• Open design spacer
• Gaskets and hardware included
• Heat-insulating construction
• Black finish
• Bolt-on installation
• Single unit (each)