The Edelbrock 2-inch open-hole carburetor spacer #8712 is a black phenolic plastic spacer designed to add significant plenum volume or carb-to-plenum floor distance. At two inches thick, it provides heat insulation to reduce heat transfer to the carburetor and is intended for applications where larger spacing is required to alter intake tract characteristics for tuning and thermal management.
Edelbrock Carb Spacer 2-Inch 1-Hole