Originally Posted by M7H
Maybe that's why he uses them once?...
Here in Holland the INS-BOX is mandatory, which also keeps the filter really clean, so I use 1 (new) airfilter for each of my engines (2) for the hole racing season....
INS-BOX is mandatory in Australia too and yes it does keep filters cleaner, I use like max 3 filters in 1/10 the whole season, I just wash them really well.
But for all the guys who use them one meet and throw them , as I said I will buy them off ya.