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headers on a e350 460

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Old 05-28-2004, 10:21 PM
colwilly colwilly is offline
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headers on a e350 460

Hello All;
Just wondering if any one out there knows if say I was going to purchase and install a set of Doug Thorely headers (smog headers) on a 1977 E-350 C-class with a 460 if they pass the dreadfull smog test in the golden state.
Has any one here in Ca. done anything like this.
Thanks to all who respond.
I have a manifold leak that is getting a little worse, And from what I understand these 460's are nortorious to leak on the pass. back side. And headers are the only remedy to the problem.
Once again thanks,
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Old 05-30-2004, 08:58 AM
dk5122 dk5122 is offline
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If their smog headers I don't see why they wouldn't pass. As long as your truck doesn't have any other issues. I'm not in Ca. but we have the smog test here also. You should notice a nice little increase in power also with the Thorleys.. Good luck
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Old 05-31-2004, 09:20 PM
colwilly colwilly is offline
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Took the Dog house to inspect for the leak and its comming from the pass side second from the back, But the question is... I noticed no smog crap on the manifold , Doug Thorely offers 2 different headers for this conf. What would be the differance between smog and non smog headers? The headers are gonna run me about $400 from summit, Would I notice much difference in performance-gas milage with the headers or would I be better off just repairing the manifold, This particular 460 is pulling a 23' C-Class motor home
Did a search for these headers and summit seams to be the cheapest any other suggestions out there?
Thanks:
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Old 06-03-2004, 09:26 PM
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Gobstopper909 Gobstopper909 is offline
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smog headers have a tube going into one of them from the air pump (i think) all you have to do is cap them off (they should have a screw in nut that blocks them off) and yes you will have noticeable power gains from the headers...remember the tool man... MORE POWER
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