Stromberg WW Small Rochester 2G Holley Carb Spacer Phenolic Insulator Riser 1/2" Kit
This is a 1/2" phenolic carb insulator that helps prevent carburetor boiling or heat soak. This is CNC machined and comes with FREE gaskets, custom 5/16" bolts machined with fine thread on one end and coarse on the other, along with nuts and washers.