the Zoodad mod won't give the same effects on a open air element that it does on the stock snorkel intake. In stock mode you have a ram air effect where the air is directed to the filter element, with a open air filter the zoodad will simply lower the air temp from the engine compartment, which isn't a bad thing, but you probably won't see the S.O.P. difference many do with a stock or AIS intake.
NCH