I dunno, even if they are re useable and you do re use them the max number of times it is stil expensive. Also On certain applications I highly doubt they benefit, but would the factory really leave them off if they added 10 HP to a 120 HP car? I doubt it. Now putting one on a 800 HP engine and gaining 10 hp over a wal mart paper filter, I could see how thats possible.
For $60 you could buy better preformance stuff , plus I think accel sells thier brand of "Preformance filer" for like half as much as a K&N and saposedly they flow more air. Plus ...its blue...how trick is that yo...
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I'd rather be rich than stupid.
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