Moroso Phenolic 4-Hole Carburettor Spacer (MO64943)4150 CARB 1 2" SPACER 4 HOLES Suit 4150 4160 Carburettor, 1 2" Tall With 1 3 4" Bores Part Number: MO64943 FEATURES: Advanced phenolic compound, specially formulated to reduce heat conductivity 10 times greater than aluminium Reducing fuel temperature inside the carburetor results in a denser, more powerful fuel charge to the manifold Insulating phenolic spacers come pre drilled for alignment pins Gaskets not included