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If all you want is a filter with the stock air box it is about $60 I think. but, if you are going to get a hi flow filter get a full kit with a new back plate so you can feel the full effects of it.
If you want the stock look with the stock air filter cover but with the aftermarket performance, I went with the K&N RK 3909-1. It has a new baseplate, a bigger air filter and fits under the stock cover. Very easy to install.
If you go for the RK 3910 it is a bit wider and it will stick out more and might interfere with your right knee.
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Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
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Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
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