Not sure if that's the case. Not why i did it anyway. I spent my inheritance on em because I wanted something new, unique, and that supposedly made more hp. The clearance issue was an added bonus that was pretty cool. But just like SonofSand found out though, i didn't have the correct combo of stuff. I guess I should correct that, had correct filters. Didn't have correct intakes. So mine rubbed all over just like my old shearers and vitos did. Changed intake and problem went away.