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Headers V's Cast Iron Exhaust manifolds By Ian Dobson - 10/07/2000 6:42:43 AM; IP 24.113.52.246 does anyone have any real numbers on how much is to be gained in H.P. by using headers on a 390GT as apposed to the cast iron intake manifolds? I guess you are saving 50LBS in weight, but are you actually getting a power advantage also? Just wondering, as I've always had headers on my Mustang, and of course the constant header leaks no matter what you do :( I have hooker headers on it right now, and they either bottom out on speedbumps or they leak at the header gasket, and you can never get a wrench on the damn bolts to tighten them :( anyone else had good/bad header experiences on big block mustangs?

This thread, so far...

Skip Navigation Links. Headers V's Cast Iron Exhaust manifolds -- Ian Dobson, 10/07/2000  RE: Headers V's Cast Iron Exhaust manifolds -- Ted Young, 10/07/2000  RE: Headers V's Cast Iron Exhaust manifolds -- Will, 10/10/2000  RE: Headers V's Cast Iron Exhaust manifolds -- Jim Raymond, 10/11/2000

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