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As far as modding goes, my 2005. I loved the sound of the straight pipe. As far as stock power goes without adding anything I would NEVER go back to a 5.9. And personally I wouldn't wish a 12V on my worst enemy LOL
 

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You gotta remember, when I had my 12V's there wasn't as many people building them the way they are building them today. There wasn't many guys racing CTD's back in the 90's. You can thank the internet for as fast as guys are running today
 

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Also remember, back in the 90's the only guys that had CTD's were guys pulling heavy. There was no "cool factor" in owning a CTD back then. This is what I was pulling back in the early 90's
 

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And this is what I pull today and would never want to pull it with a 12V LOL
 

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Discussion Starter · #31 ·
I posted this in the 6.7 section because alot of the guys who know the 5.9 and actually answer posts are here on 6.7 all the time, and also because I'm doing this off my phone and it takes forever to change threads

on that note thanks alot for the info guys, I should be getting this truck in about two weeks just want to make sure I know what I'm getting into, but if I heard correctly it should be marked on the valve cover the HP numbers?
 

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Discussion Starter · #32 ·
Wow thanks for all the info guys, big help, so best to look for the 305 hp 2004? For best durability and mpg?
 

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Discussion Starter · #34 ·
Thought I heard something about valve seat dropping under high egt
 

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Discussion Starter · #36 ·
Lol, thanks for the seat tip, lol
 

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Thought I heard something about valve seat dropping under high egt
in 03s an 04s yes, but until you get some $$$ it wont happen, you would basically have to try on purpose to drop a seat, dont get the 04.5+ jmo they run very HOT, and mileage isnt as good as 03-04, plus 04.5+s pistons melt alot easier, just my.02 either way it is a cummins
 

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Discussion Starter · #39 ·
Well I plan on lifting it 6" with 35" MUDs all around the dually, I dunno how it's gunna ride but it's my toy, sold my bike and my car to get a second cummins
 

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Discussion Starter · #40 ·
Hey one more question, do I need to run a tuner to put exhaust on the 5.9? I mean will it throw codes without a tuner?
 
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