And here's me trying to explain things simply, well in reality on both the flowbench and the dyno + keeping things to a resonably affordable level the foam airbox filter works very well without any drop in performance over the original type and it certainly filters the incoming air to a better level than the original. On our BSB winning bikes we have used two types of JHP filter one being the foam in airbox type before the shower type injectors were employed and I think if they were good enough to win BSB races in the past then they can't be to bad ! Regards jhp john |