Can't comment on the BTG but I've had the K & N FIPK for almost 2 years and wouldn't have anything else. The one thing you might not like is it really roars when you put your foot in it. Much more than any of the other systems I've seen. Why I don't know other than it's flowing more air than some of the other systems out there.
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Greg Gavencky
The New Jersey Cruisers
www.njcruisers.com
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