STP air filter
Has anyone used STP air filters in their Bonneville? I"m using one right now after having a K&N and it almost seems like I've lost a bit of performance. I only ask because I didn't really seem to notice a different going from a stock filter to a K&N, but now almost "feel" a difference going from the K&N, to the STP. The STP seems to have a lot better filtration however. It has a LOT of ridges in the filter (atleast 25) whereas the K&N had only around 10 or so. So, has anyone else used them? What'* your impression of them?