jimbo .........
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just keep an eye on your oil consumption ....
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and replace those shock absorbers .......... !!!
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also .......
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jimbo - my guess is that most, if not all - of the 'less restrictive' air filter elements will allow more 'particles' to pass through .......
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although many/most/all? do have a larger surface area (due to design my guess - type of pleat, whatever) , I believe the element material itself is less restrictive ........
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it probably would not stop me from installing a K&N though ..........