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Exhaust 5.7 HEMI Exhaust Discussion


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  #1  
Old 05-24-2010, 11:57 PM
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what the difference between coated INSIDE and OUT and just oustide. 425 or just for outside
512 for both i have a 07 4x4 see if they fit but should i get both in and out
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Old 05-25-2010, 06:10 PM
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anyone wanna chime in
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Old 05-25-2010, 06:53 PM
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From a hp standpoint you might be able to argue that the inner coating helps keep heat in the primary tube which SHOULD keep it's outbound velocity higher but IF it does, it ain't much. I know some header company's say they can't guarantee the full anti-corrosion benefits w/out doing inner and outer to seal the header.
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Old 05-26-2010, 11:46 PM
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If they are not coated on both sides don’t get them. Below is part of an email I had with a header company regarding why you shouldn’t wrap headers and why you should spend the money for coated headers inside and out.

"If you notice coating is applied to the inside and outside of the tube. So in other words, no more heat is allowed into the metal than is allowed out. This is why ceramic coating inside and out works. If you ever purchase a set of headers that are coated only on the outside, I would go ahead and start saving for another set that you will need to buy when these headers crack and fall apart."
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Old 05-27-2010, 01:20 PM
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hmm what company was that
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Old 05-28-2010, 08:40 PM
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The co was Dynatech
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Old 05-28-2010, 08:45 PM
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hmmm bc a buddy of mine has them outside only and they been fine for years
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Old 05-28-2010, 09:30 PM
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It's just one of those risk things. Depends on the environment they see, mileage, etc.
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Old 05-28-2010, 10:43 PM
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Quote:
Originally Posted by MotorCityRam View Post
It's just one of those risk things. Depends on the environment they see, mileage, etc.
me confused
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