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aaron_eb
Dodge Dakota
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10/06/2004
10:14:10

Subject: Exhaust Recommendations
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Howdy all, I need to do a full exhaust replacement, from the headers to the tail pipe. I've got a local guy to bend the pipes for me, but I want to know what the best high flow cat would be. I'm also thinking of going with a flowmaster 40 series exhaust. I have a K&N drop in, and a RT throttle body, unported. That's about all I've done to the intake. Any recommendations on the cat and pipe sizes would help greatly. Thanks, Aaron



Randy
Dodge Dakota
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10/06/2004
11:13:55

RE: Exhaust Recommendations
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well The factory pipe sizing is pretty good as far as diameter for the 3.9. Your pipes coming off the manifold can be 2.0" OD and then come together into a single 2.5" pipe. Flowmaster makes a y-pipe this size that summit sells for $35. Read posts regarding flowmaster mufflers- you'll probably conclude that a 40 series (2 chamber) is going to be the wrong choice. Depending on if you want dual outlet tailpipes or single there's quite a few aftermarket cat-back systems that are decent. I'm having a kit custom made for me by hearthrobexhaust (.com) that has the dual outlets behind the wheels because I think that looks better than the out the back style. That company has the best prices I can find for both cat-back systems and custom bending.



aaron_eb
Dodge Dakota
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10/06/2004
16:28:17

RE: Exhaust Recommendations
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Thanks for your reply, I find it extremely helpful. The 40 series is just what I was leaning towards, nothing's set in stone as of yet. I plan on comming out the same place as factory, I just need a new system, the old one's getting in pretty bad shape. Also I need a new cat, looking for high flow aftermarket. Any input is helpful and appreciated. Thanks, Aaron



bdeeds
Dodge Dakota
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10/06/2004
16:39:51

RE: Exhaust Recommendations
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Just put a Flowmaster 40 under my truck...cat back to the pipe. Took a bit to break it in, but for my mostly stock Dak, I love it...little better performance...great sound!



93dodgewyo
Dodge Dakota
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10/07/2004
07:01:06

RE: Exhaust Recommendations
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I just installed Strait pipe from the headers back with a 40 series and I found it to be a massive gain in throttle response. Yeah I did go strait pipe, cause in Wyoming, there aren't any emissions laws.



GB2000
GenIII
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10/07/2004
08:25:01

RE: Exhaust Recommendations
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Car-sound high flow cat... Flowmaster 40 series muffler... 2.5" pipe (unless you run dual outlets...then most recommend 2.5" in/2.25" outs). You might wanna go with a Delta Flow 40 if you don't like the interior resonance. I like my exhaust...it's a 40 series with a 3 1/2" turndown off the muffler. Sounds GREAT at idle and lower rpm's, but typical V6 at the higher rpm's. The interior resonance is pretty bad as well, but I enjoy having it loud like that.

Anyone put one of those new super 40's on their 3.9's yet? I'm curious on how those sound...I may switch mufflers if they're a lot deeper.

Josh

http://www.cardomain.com/id/sentenced

cj
Dodge Dakota
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10/08/2004
12:05:41

RE: Exhaust Recommendations
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yes gb2000, i put a super 40 because i didnt totally like the original 40 series, and got the super for really cheap. It sounds great. Its obviously the same good low rpm sound and v-6 screamer at high rpms, but it takes a higher rpm to get that weird sound that the original 40. Overall its a tid quiter, but rumbles better and louder outside with less sound inside.. so ok lets just say i like it better



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