Twin Air - Air Filter Cage Air Filters

2 – strokes: the best filter in the world can’t do its job if there are leaks in the seal of the airbox.That’s why twin air provides a complete line of products to ensure a leak-proof, fool proof fit.Twin air’s powerflow kit comes with a rigid, lightweight, billet aluminum cage that provides a tight seal to the airbox and replaces your flimsy plastic stock cage.4 – strokes: twin air powerflow kit for 4-stroke models: replace your air-restricting stock backfire screen with our new powerflow kit.The kit includes a rigid, lightweight, billet aluminum cage with a special backfire-resistant layer of foam laminated to the inside of the filter.