Well i awm running a stock 1 barrell, and i boutght one of those little ones, it cam with a base that I had to leave off, the bottom of the filter element contacts all the way around the carb and allows forust the filter element and the lid to be tightened down, I kind hat the lawnmower look to it though. it owudl be ok with 3 of those but the one looks kinda silly, but it works until i get a gt scoop, and make it functional.