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headers on a e350 460
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05-30-2004, 08:58 AM
dk5122
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Join Date: Jul 2002
Location: Bel Air, MD
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If their smog headers I don't see why they wouldn't pass. As long as your truck doesn't have any other issues. I'm not in Ca. but we have the smog test here also. You should notice a nice little increase in power also with the Thorleys.. Good luck
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