Originally Posted by
Goldwing
I have K&N in both of mine and frankly they make no difference. If I had it to do over, I would stay with stock.

PLUS, an additional down side. IF you over-oil them after cleaning (tricky because you have no idea what the correct amount is) and the engine ingests some of it, it'll ruin at least the MAF sensor (so I've been told).

Not sure if that MAF sensor can be adequately cleaned afterwards (I've been told a big NO, it's ruined)...
.