While I was happy enought with the K&N 2780's performance I thought they looked to Small and I want something Bigger Then a little while back I remember Wayne Tripp mentioning these Bigger K&N's they are the RX-4040 and they are twice as big but at least look like they belong on the Rocket and will Alow better breathing for my Future Engine Mod's and apart from having to cut heaps more of the claw I also found a nice Stainless bottle for my radiator overflow seeing as It had to go, Condemm it or love it I don't care cos I love it, makes the other wise very bland left side come alive now I just want to get covers in Red or Yellow and I will be happy as a pig in mud