Just keep what you have. The under car kit dirties up your air filter quick. Road debris, leaves, etc.. Any of the ose cold air kits are only worth about 1 or 2 horsepower over the stock airbox with a K&N panel and no silencer. That is with a built motor. A stocker would see less than that. This is what I have and m car runs pretty good.
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1988 Mustang GT
11.8 @ 123 (7/14/01)
1992 BadAzz Wrangler
1993 Explorer
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