3rd Gen High Performance and Accessories (5.9L Only) Talk about Dodge/Cummins aftermarket products for third generation trucks here. Can include high-performance mods, or general accessories. THIS IS FOR THE 5.9L ONLY!

5" exhaust

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Old 12-08-2004, 12:31 PM
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Question 5" exhaust

sorry I brought this up again but I asked the question yesterday and now I can't find the thread I was on when I asked.
What do you guys think about a 5" exhaust ,straight pipe of course on, the 3rd gens. I know it could hurt performance some but I can't see it being enough to bother me. A friend of mine in College Station said he saw one with a 5 inch but didn't have a chance to talk to the guy. He looked at it in a parking lot and it was 5 to the down pipe at least. He swears it was the best sounding third gen he'd ever seen and has been pushing me to get mine straightend. Just wondering what your thought were and what performance would be lost.

Its gonna be loud if I get it done!!
Old 12-08-2004, 01:46 PM
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Got it, love it, doesn't hurt performance any as long as your makin power like me!
Old 12-08-2004, 03:06 PM
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Same here, love the sound.
Old 12-08-2004, 03:54 PM
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i have BD's 5" on my truck [w/muffler]. i think it sounds good...
Old 12-08-2004, 04:04 PM
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Go get the 6" if you want to get peoples attention!!!
Old 12-08-2004, 04:52 PM
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I believe you only need the 5" if you're putting out a lot of power. I don't think it will hurt it if you're not, but it's not really needed. I thought about it for mine, but decided that for price and what I'm doing with it now... it wasn't gonna be worth it.

But if I had a TST stacked with an Edge or a BD box... yea I'd do it.
Old 12-08-2004, 06:19 PM
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LOUD 5 Incher

slimpicken,

If you want the potential for max HP mods and you like it loud then a 5 incher it is!!! We have them with and without a muffler to save some cost and to make it as loud as possible. Check out our site for the ones with a muffler and call us if you are interested in the no muffler system.

Mark @ DPPI
Old 12-09-2004, 11:39 AM
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the 5 inch is nice
I bought one of the first available kits for the third gen trucks
the piping was excellent
however the hanger system sucked to say the least
none of the hangers lined up with anything the way it was supposed to
if I were not a fabricator I would have had a LOT of trouble installing this kit

hopefully they have improved the hangers since then

performance wise
there was no loss in power like some say
there also was no difference in egts vs the stock 3.5" system and stock fueling
I think if you were running twins with LOTS of flow
there may be a difference in egts
Old 12-09-2004, 11:45 AM
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I actually lost some egt's with mine, and on my 02 I picked up 8psi boost and dramatically lost egt's. Every CTD I will ever own will get the 5" treatment
Old 12-09-2004, 11:49 AM
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I like mine, but I'm thinking of getting rid of it and going with 5" or 6" stacks down the sides of the truck to the rear fenders.
Old 12-09-2004, 12:17 PM
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Originally posted by Patrolman808
I like mine, but I'm thinking of getting rid of it and going with 5" or 6" stacks down the sides of the truck to the rear fenders.

What??
Old 12-09-2004, 02:59 PM
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Side pipes, basically...
Old 12-10-2004, 07:31 AM
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OK, should look nice!!
Old 12-10-2004, 12:54 PM
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Re: 5" exhaust

Originally posted by slimpicken
sorry I brought this up again but I asked the question yesterday and now I can't find the thread I was on when I asked.
What do you guys think about a 5" exhaust ,straight pipe of course on, the 3rd gens. I know it could hurt performance some but I can't see it being enough to bother me. A friend of mine in College Station said he saw one with a 5 inch but didn't have a chance to talk to the guy. He looked at it in a parking lot and it was 5 to the down pipe at least. He swears it was the best sounding third gen he'd ever seen and has been pushing me to get mine straightend. Just wondering what your thought were and what performance would be lost.

Its gonna be loud if I get it done!!
Maybe six or 8 months ago Ted Jannetty of Jannetty Racing did a thread on this issue. Basically what was said (based on dyno and not SOTP) was that it helped but above 500HP. Under 500HP, depending on how far under,..it could reduce performance dramatically as it caused defueling. I don't recall his test being on a straight pipe however. This comment is based on thread I read. I don't run 5" myself so I have no first hand knowledge, FYI.
Old 12-11-2004, 07:50 AM
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it could reduce performance dramatically as it caused defueling
i remember reading that too, but that was stock. as soon as you add a fueling box to cheat the map sensor, that issue is resolved...


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