According to Airaid, their SynthaMax Dry Filters and SynthaFlow oiled filters have more or less the same flow efficiency and filtration ability. The dry filters are just much easier and less expensive to maintain in the long run, since they don't require filter oil. The oiled filters have a lower base price. This kit and BBK kit will likely make similar power and performance, though the BBK kit does use a metal inlet tube which can raise IATs over plastic tubing like the Airaid. The BBK kit also only comes with an oiled filter.