Moroso 64940 - 1" Open Plenum Plastic Carburetor Spacer

• Advanced plastic compound, specially formulated to reduce heat conductivity 10 times greater than aluminum
• Reducing fuel temperature inside the carburetor results in a denser, more powerful fuel charge to the manifold
• Includes all mounting hardware
• Gaskets not included
• 1" Thick
• Open Plenum Spacer. 3.62" Inside Diameter
• Formulated To Reduce Heat Conductivity 10 Times Greater Than Aluminum.
• Fits Holley® 4150/4160 Carburetors.