Have you ever looked at the factory "headers"? *LMAO* What a poor excuse for headers..
Open it up...install some 1 1/2 headers if you don't plan on doing many mods in the future...
But if you do plan on adding heads,cam,intake...most definately move up to 1 5/8 headers,preferably long tubes as well.
Fords have a heck of a time breathing,so the easier you make them breathe,the better off you will be.
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Paxton Blown 87GT
ICQ#112698436