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Old 08-02-2020, 05:28 AM
Bob Timmermans's Avatar
Bob Timmermans Bob Timmermans is offline
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Join Date: Aug 2002
Location: The Netherlands , Europe
Posts: 185
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The fact that most production cars use paper filters is reason enough for me to not use foam.
If there was any upside on foam it would get used in production,

Only usefull in short dirt track races , were you wash them after every race.