11-07-2002, 05:10 PM
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CC Member
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Join Date: Jun 2001
Location: Washington DC Metro (Virginia),
VA
Cobra Make, Engine: Classic Roadsters, Tweaked 351W, T-5Z, CRII Tech Support Team.
Posts: 1,895
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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.
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