This 1/4" thick phenolic riser kit for the Early 1957-65 AFB 4 barrel carb that has smaller primaries and larger secondaries with a mounting pattern of 4-1/4" x 5-5/8" on center. This is found on the early dual quad Chrysler setups and others and was taken from the original pattern.

Add a little performance to your machine the cheap way, and keep the heat away from the carburetor to solve the heat soak or carburetor boiling issues. Email or call 608-637-7167 for questions at Dashman's Hot Rod & Speed Parts.