3.6L jeep jk exhaust options

A lot of people run either the dynomax evolution or the rock crawler system. Both sound amazing and what I would recommend. I personally run the rock crawler on my 2 door with the 3.8 and couldn't be happier.
 
I'm running the Dynomax Ultra Flow Welded. Took it to a shop and they cut off the resonator and muffler and welded the Dynomax in place where the resonator was. Cost was about $130 after everything and took the guy about 30 minutes. Sounds great. Drones at low RPM but doesn't bother me or my passengers.

- Roland
 
cozdude said:
A lot of people run either the dynomax evolution or the rock crawler system. Both sound amazing and what I would recommend. I personally run the rock crawler on my 2 door with the 3.8 and couldn't be happier.
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Link? I see nothing by either of these names on their website.
 
H8ROADS said:
Link? I see nothing by either of these names on their website.
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rock crawler 12-15
2 door http://www.dynomax.com/single-2-5-cat-back-system-ultra-flo-polished-muffler-39323.html
4 door http://www.dynomax.com/single-2-5-cat-back-system-ultra-flo-polished-muffler-39322.html

evolution 12-15
4 door http://www.dynomax.com/single-2-5-cat-back-system-ultra-flo-polished-muffler-39321.html
same one for 2 door but you need to cut 2.5" off the one pipe. its in the instructions
 
cozdude said:
rock crawler 12-15
2 door http://www.dynomax.com/single-2-5-cat-back-system-ultra-flo-polished-muffler-39323.html
4 door http://www.dynomax.com/single-2-5-cat-back-system-ultra-flo-polished-muffler-39322.html

evolution 12-15
4 door http://www.dynomax.com/single-2-5-cat-back-system-ultra-flo-polished-muffler-39321.html
same one for 2 door but you need to cut 2.5" off the one pipe. its in the instructions
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Thanks!! Guess they're using different marketing terms now - I saw those kits but nowhere did I see "evolution".
 
H8ROADS said:
Thanks!! Guess they're using different marketing terms now - I saw those kits but nowhere did I see "evolution".
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your right when you look at the overall list it isnt marked as the evolution system but once you click on view product. its called the "Ultra Flo Evolution competition system"
 
Is it just me, or does the rock crawler kit stick out to far? I'd prefer an exhaust that dumps after the axle, but not quite that far.
 
cozdude said:
your right when you look at the overall list it isnt marked as the evolution system but once you click on view product. its called the "Ultra Flo Evolution competition system"
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Ah... You're right. Thanks!


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Static83 said:
Is it just me, or does the rock crawler kit stick out to far? I'd prefer an exhaust that dumps after the axle, but not quite that far.
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it actually doesnt stick out far at all. mine end right at the rear bumper. if you look it doesnt go past the d ring. the only way it sticks out is if you put the chrome tip on it
 

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This is what I did to mine... actually the rocks did it, I just cleaned it up a bit. :)

20130429_104154_zpsfa0325f0.jpg


Static83 said:
Is it just me, or does the rock crawler kit stick out to far? I'd prefer an exhaust that dumps after the axle, but not quite that far.
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Installation of the competition was a breeze. Make sure you have deep well sockets or the appropriate box wrench for the y pipe clamp.

Sounds great!

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cozdude said:
it actually doesnt stick out far at all. mine end right at the rear bumper. if you look it doesnt go past the d ring. the only way it sticks out is if you put the chrome tip on it
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I cant help but wonder, is running the muffler that close to the evap really a good idea? At least without a heat shield?
 
H8ROADS said:
I cant help but wonder, is running the muffler that close to the evap really a good idea? At least without a heat shield?
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i havent had any issues as of yet (knock on wood) with it like this. i have checked my evap a few weeks ago and all seems well with it. no melting of plastic or anything. im sure on the newer models like yours that come with a stock evap skid it would only help prevent any issues.
 
I haven't heard of any issues and I have been doing this for 5 years. We have been making this system since 2007 and I haven't been told of any issues. I drive 8+ hours, no issues either. HTH :beer:

H8ROADS said:
I cant help but wonder, is running the muffler that close to the evap really a good idea? At least without a heat shield?
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DynoMax Exhaust said:
I haven't heard of any issues and I have been doing this for 5 years. We have been making this system since 2007 and I haven't been told of any issues. I drive 8+ hours, no issues either. HTH :beer:
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Straight through mufflers don't get as hot correct? Seems that way at least since there's little air flow restriction. I've had mine for about 5 months now and no issues that I can see.

- Roland
 
DynoMax Exhaust said:
I haven't heard of any issues and I have been doing this for 5 years. We have been making this system since 2007 and I haven't been told of any issues. I drive 8+ hours, no issues either. HTH :beer:
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Good to know! Thanks for the confirmation. I didn't doubt necessarily, was mostly curious.


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