Anyone do any measurements w/stock airbox on a CSVT. I'm having a hard time justifying taking mine out. It just seems odd to take it out of the box and then construct a partial shield around an open-air filter. I'm happy w/stock box and a K&N(which needs to be cleaned in the worst way. After all it is pulling air from the wheel well. Has anyone gone from K&N and stock air box to an open air with a shield? If so, what the butt dyno say?