It just depends on what you're looking for. The replacement elements work great and it will be the last one you eve have to purchase. If you're looking for the cone filters, tests show that they really don't make much of a difference over stock. Plus you have to get the short 6" filters since the space is very tight. However, if you're looking for a nice growl from your engine, these filters will do the job. I did install cone filters in lieu of my airbox and it does have a throaty growl. I really don't know how much or if it even made a difference because I put in the Dinan chips and an exhaust on my 750 at the same time. Is it worth it? I have heard anywhere from 3 to 20 hp increase??