[Jack21]

All of the street replacement heads have the intake, and exhaust manifolds (& headers) using the same bolt patterns and gaskets. The higher up the curve you go toward a track or racing head, the more the manufacturers take liberties with moving things like exhaust ports and bolt patterns around to optimize flow.

So the FMS Sportsman, TFS-R, and the like, will need a new set of headers. Roush Iron heads, Ede Performer RPM, AFR 165 - 185, TFS Twisted Wedge Street need no exhaust modifications.

If your TFS heads have the 2.02/1.60 valves, see no advantage to replacing with Ede's. You may even loose some HP.