If they are the stock type of GT40s for the Mustang, they'll be fine. The GT40-P heads (from Explorers) have a different shape exhaust port that requires different headers.
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2003 10th Anniversary Cobra Convertible
All Stock and staying that way... well maybe some pipes since it's so quiet..ahhhh! it's a sickness
1995 mustang GT vert - all black (almost back together)
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