KB Carbs Circle Track Racing Carburetor - Alcohol - 4150 Series
Available in the following Bore Size / CFM.
1.375 - 750 cfm - good on 350-383 limited style engine mod or late model
1.400 - 850 cfm - good on wissota 360 and similar engines
1.450 - 950 cfm - good on 400 and larger including australian open late models.