quote:
Originally posted by commeracer
the i/d of the filter is 2"
yes there is a multitude of alternative filters out there, whether they do the same job or not is debateable.
most of the pipercross/itg foam types flow more air but at the expense of filtration, and neither is flameproof.
k&n,s have an electrostatic charge which allows them to filter out finer particles, which are the ones that do the damage. there is some cheap copies out there as well,so dont be fooled.
when you consider that an engine needs about 2.2 C.F.M of air for every BHP it produces and the amount of debris in the air, you can soon see why unfiltered race engines smoke, it only takes a couple of laps to wreck the piston rings.
personally after spending thousands building serious engines i would not consider using anything but k&n,s, especially as they have been proven to increase power over an open intake.
and no i don,t have shares in the company
"you were only supposed to blow the bloody SLIDING doors off no.3"
Point taken-however I personally do believe K&N are overpriced.For the last 4 years ive owned and tuned some of the known japanese sports cars-Skylines,Supras etc and never had a problem with any of the cheaper brands (though I did normally go with HKS for the name in the end-which is probably the most overpriced brand in the history of tuning)