04-28-2011, 05:34 AM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
The undercar exhaust on originals with the cast iron restrictive exhaust manifolds loses about 100HP. If you use tubular tri Y headers with 2" primaries and good mufflers you'll only marginally affect performance. I have made them for originals and newer cars and they look and work good.
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