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The way we found this out was, did run on dyno with no air filter.Took reading, then dynoed again with gerolomy filter and we could see the difference in the numbers. It was my call . Other wise i would not have bought it, but it was significent enough to me to spend the extra $. GOOD LUCK.
Myself and others I know have been running the 29442-990 SE air filters on Softails for a lot of miles, and I've never seen one coming apart...
Ride in some pretty dusty conditions (here in the windy, dusty lower midwest), and on average they are replaced every 7,000 or so miles.
I'm going to check with my Harley mechanic friend and see if he has heard about some kind of problem with these filters, but from past experience (myself and guys I ride with) this almost seems to be an exception and not a wide spread common problem.
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