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

For Early Carter AFB Phenolic Insulator Spacer 4 Barrel Carb Riser 1957-1964 1/4

For Holley Spread Bore Carb Phenolic Insulator Spacer Heat Soak Riser 1/4 Open

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

Fits Weber Carb Spacer 40 mm DCOE Riser Phenolic Insulator 40mm Dellorto 1/4"

For Early Carter AFB Phenolic Insulator Spacer 4 Barrel Carb Riser 1957-1964 1/2

Fits Carter AVS Phenolic Carb Insulator Spacer Heat Soak Riser 4 Barrel Kit 1/4"

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