[fiveohpatrol]

well the normal iron GT40 heads are no longer being produced so the best place to find them is either in a classifieds section or your best bet is to scour eBay for them. They're also normally a pretty popular item at swap meets.

If you are willing to buy a new set of headers, the GT40P heads are going for a pretty good price. Summit has started carrying them completely assembled for like $540 a pair. You'll have to get a set of motorsport headers though because the spark plug is at a different angle.

hope this helps
-Drew