air filter-
instantly noticed a difference in throttle response and a slight difference in induction noise. sadly cant compare things like mpg and performance as I'm just new to the bike and. but just for the fact it will last the length of the bike now with only needing a clean at the service intervals, I'd say it's a must.
oil filter-
not much to say about an oil filter. but it brags alot on the packaging and you can actually feel the quality in it just holding it. the "pre lubed seal" stops the need to dunk you'r finger in the oil you just drained to smear some on the seal, and the 17mm hex head on the end for sticking a spanner on is a god send! and the oil pressure light goes out before the engine even starts too!