Kuryakyn 9409 Pro Series Hypercharger Air Filter Kit Dyno and race track proven Kuryakyn Hypercharger The body is 1/2in. wider and nicely contoured Filter area has been increased by a full 50% 1-piece construction, ball-milled speed lines, symmetrical butterflies and Pro embossed bearing cups Inner surfaces have been smoothed and relieved to work with the added air cleaner surface area for increased air flow and velocity