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I am not sure on the performance of these headers but, I did have a set of edelbrock headers on my last truck a chevy silverado w/5.3L V8. They are nice and a good improvement, granted that there are equally upgraded cat back exhaust and intake, a computer programmer will help too. These are all my next big thing to do. The Edelbrocks were only like $300.00 or so for the chevy so a 6.0 should not be much more. Good luck with your decision.
 

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If you decide on headers, I would go with the ceramic coated. I run ceramic coated Hooker Comps on my race car. It helps keep the heat inside the header tubes thus reducing engine compartment heat and improves exhaust scavaging.
 

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i suggest a full system, from headers to cat's to full exhaust. and if possible an intake too. that can usually increase horsepower dramatically.
 

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Discussion Starter #6
So I should have other exhaust mods first? I want to gain the power but I don't want it to sound so... un-Cadillac. You know what I mean?
 

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TOG (The Other Guys) headers are good, I know several people that have them, also SuperMaxx has good truck headers, I know several people with them. Get the coating, it makes the headers last longer, and keeps the underhood temp lower too. With headers and a good exhaust system you will gain 30-40 hp, well worth it. :)
 

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If you want a clean sounding exhaust that does not sound too throaty or loud, go with Corsa. It sounds a tad louder than stock. Under acceleration, it sounds great!

BTW, I have tried B&B, no mufflers, Corsa, and Borla. Corsa is the best, then Band B, Borla, then no mufflers (no mufflers is the meanest/loudest - definately un-Caddy like).
 
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