Well me personaly I would go with a least a 2.5" from header back. No cats with some 40 series Flowmasters. I have tried quite a few and the only thing I like better is the Borla system. But that is a little expensive; I wish I would have never sold mine.
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90' 5.0 GT Convertible Mustang. Too much to list here so if you want to know ask me.
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