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Originally Posted by High_Revs_17
I don't have numbers available but bikes have been known to actually lose horsepower after switching from the OEM filter to a K&N, but I'm not sure if the bikes tested had aftermarket exhausts and other engine/exhaust mods or not.
(guess this went from an oil to air filter thread now  ) |
if you are talkin about the air filter, yes it is true. there has been several of people claiming that already over at r1 & r6 forum. there has also been claim that the BMC race filters let too much air through and doesnt "clean" the air as well as OEM filters. so far the best bet is to go with the OEMs cause they seem to be doing the best.