Are you experiencing poor engine efficiency? It could be that old factory paper element giving you problems. If that is the case, replace it with SynthaMax Direct Fit Premium air filters from Airaid! These air filters can provide unrivaled filtration efficiency over the traditional factory paper filters. Plus, their oil-free maintenance makes them one of the easiest filters to service on the market. Servicing these filters is simple--just wash them with a mild household detergent, rinse, and reinstall--you should be good to go!