Ditched the OEM 690 airbox and installed the Rottweiler Intake System quickly and with ease. Matched this with a pipe, fuel re-map and the performance cam with great results. Always a great buying experience with The Twins! Super nice to have one stop shopping and prices equal, or beat, my loca KTM dealer. Highly recommend the Rottweiler Intake Sustem AND KTMTwins!