1/2" Phenolic Carb Spacer Kit - Square Bore - 4 Barrel

1" Phenolic Carb Spacer 4150 Holley Square Bore 4 Barrel Plastic 1 Inch Spacer

For Rochester Quadrajet Carb Phenolic Insulator Spacer Heat Soak Riser 1/2" Open

Fits Holley 4150 4160 4 Barrel Phenolic Carb Insulator Spacer Heat Riser Kit 1/2

For Rochester Quadrajet Carb Phenolic Insulator Spacer Heat Soak Riser 1/4 Open

1/2" Ported Phenolic Carburetor Spacer, Holley Style

Fits Holley 4150 4160 4 Barrel Phenolic Carb Insulator Spacer Heat Riser Kit 1/4

For Carter WCFB Phenolic Carb Insulator Spacer 4 Barrel Heat Soak Riser 1/2" Kit