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DIY '01 Air Filter?

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Have any of y'all made a air filter for the '99 - '01 (and possibly others) model "flat" air filters? They seem awfully easy to make and would sure beat the $30 price of an OEM filter. I'd assume you can just use some high density (high PPI) foam from a local shop?

Any insight?

You can buy filter foam in sheets and then cut to size. You can double or treble the layers to give finer filtering just be careful you dont cause a restiction to breathing. Experiment on scrap filter foam if you use a glue, some will melt the foam. If you are careful you can end up with a very workman like replica of the original. Foam obviously must be petrol proof.

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