Empire Industries Cyclone Series Exhaust System for Honda TRX 400EX . Tig welded 304 stainless steel construction. Step pipe design for maximum horsepower gains. 6061 Aluminum silencer with billet end caps make for easy repacking. Billet silencer end caps are available in anodized blue,black,and raw. We have dyno tested our pipes against the best and we always come out on top. If you’re not running 1 you’re probably behind 1!