We try lots of new things. Corona guys told us about a "NEW" air box they have been using,SO. Moto Tas.(the reed block guys) came up with a vortex?ram induction? tuneable air boot.
Had them send a couple out to us and tryed it out last weekend(H-R).
Real difference was in the throttle response,much cleaner,sharper then stock(2011 250 CRF)FI. Didn't notice a gain in HP at least nothing to say wow about. Makes a difference but for most riders not so sure its where they should spend their money. Teams like PC that look at every edge they can get yes. Think retail is in the $300 range. JR

Have see more than a few of those showing up on Lites SX bikes. Make sence that high level riders would feel them more than average Joe