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Old 06-13-2014, 04:03 PM   #1
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cat back exhaust

Looking for some advice on cat back systems. Any one have any tips on easy to install vs. cost? Looking for some information on best performing as well.

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Old 06-13-2014, 05:07 PM   #2
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Performance and Jeep in the same sentence is a bit contradictory.

However, if performing in the rocks with something like higher ground clearance is what you mean, then I'd take a look at the aFe high tuck cat-back:

aFe CAT BACK

The also have an axle back version of the same exhaust (easier install).

aFe AXLE BACK

Here is a good video of how it sounds.



There are a number of vendors that sell the aFe exhaust systems.

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Old 06-13-2014, 07:24 PM   #3
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Thanks for the info. Looking for something that will give it a little more low end torq. Is there a tuner that works well with this system?
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Old 06-14-2014, 10:04 AM   #4
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Installed the aFe hi tuck catback exhaust on my '11 and really didn't notice any performance improvements. The exhaust is definitely more throaty and drones a little on the highway. Several months ago I used a FlashPak 3872 to flash a 87 Octane tune into the ECU and noticed some difference in shift points and acceleration. Gas mileage may have gone up a little, but haven't gone on any long highway drives to document the MPG.
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Old 06-14-2014, 11:50 AM   #5
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You're not going to get a lot more power out of this engine. The jeep really should be available with a 5.7 VVT Hemi. Mine has about 370 horsepower and im burning up my back tires too quickly...

An exhaust is a very expensive way to get "power" as well.

You can get a lot better exhaust tone though, and you can get the exhaust tucked in better so it doesnt hit rocks...

Even superchips would only get you like 10 horsepower on a 3.8.
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Old 06-14-2014, 01:38 PM   #6
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Quote:
Originally Posted by michiganadam View Post
You're not going to get a lot more power out of this engine. The jeep really should be available with a 5.7 VVT Hemi. Mine has about 370 horsepower and im burning up my back tires too quickly... An exhaust is a very expensive way to get "power" as well. You can get a lot better exhaust tone though, and you can get the exhaust tucked in better so it doesnt hit rocks... Even superchips would only get you like 10 horsepower on a 3.8.
This. I put the AFE hi-tuck on my 07 JKU. Pretty easy once you get the clamp to the cat's Y tube off. The end result is I like the low profile muffler. Highway drone sucks and has me considering Hushmat or something similar. Performance improvement is a "rated" 10-12 hp gain at 4000 rpm. Not enough for me to really notice even if I'm at that range. Even if coupled with a throttle body spacer and a CAI as aFe recommends, you'll just have a louder Jeep and not a powerful one.
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Old 06-14-2014, 03:18 PM   #7
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The op has a new Jeep so it is a 3.6. Please don't compare the 3.6 to the 3.8 , it's like comparing apples and tomatoes! The 3.6 is a pretty high performance motor and the 3.8 is a slug....just sayin'.
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Old 06-14-2014, 03:33 PM   #8
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If you really need clearance, you need to dump at axle.

I had an exhaust shop do a custom crossover set and add a Flowmaster Hushpower muffed right behind the resonator.

Sounds awesome... and it's tucked away.

Total cost was $350... beats all the aftermarket off the shelf systems.

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Old 06-14-2014, 04:42 PM   #9
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I installed a Flowmaster system recently and liked the fitment and finish quality with it's nicely polished stainless tip. The sound is a little deeper during modest to full throttle, but very mild when cruising. The only rub is the black painted finish on the muffler and pipes - it's crap. I had it professionally powder coated before installation and now it's all good.
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Old 06-14-2014, 04:50 PM   #10
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Old 06-14-2014, 07:13 PM   #11
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I believe all installs are "easy" compared to taking the OEM off. Did mine last night which included 3 hours trying to remove the oem and only 30 or so minutes of installing the new one. I went with Dynomax Rock Crawler which I paid 190.00 for it. I'm sure you can find it cheaper but it does have a 50.00 prepaid card if you buy it before June 30th. So for 140.00 and no longer worrying about the rock magnet in the back, I don't think you will find a "cheaper" deal.
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Old 06-14-2014, 08:27 PM   #12
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MBRP S5528409 stainless exhaust system install. Below is a link to the install thread.

LINK - Added a few goodies to my Rubicon - PICS

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Old 06-15-2014, 11:45 AM   #13
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Originally Posted by SLICE55 View Post
The op has a new Jeep so it is a 3.6. Please don't compare the 3.6 to the 3.8 , it's like comparing apples and tomatoes! The 3.6 is a pretty high performance motor and the 3.8 is a slug....just sayin'.
3.6 is less likely to get easy performance gains from than a 3.8, so my comparison is just fine. They're more fine tuned from the factory.

A regear would probably be a better idea than an exhaust especially with oversized tires. Might suck on the highway....
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Old 06-15-2014, 11:47 AM   #14
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Originally Posted by Skywgn1 View Post
I believe all installs are "easy" compared to taking the OEM off. Did mine last night which included 3 hours trying to remove the oem and only 30 or so minutes of installing the new one. I went with Dynomax Rock Crawler which I paid 190.00 for it. I'm sure you can find it cheaper but it does have a 50.00 prepaid card if you buy it before June 30th. So for 140.00 and no longer worrying about the rock magnet in the back, I don't think you will find a "cheaper" deal.

A cutting torch!! You can buy a torch, regulators, and hoses for cheap as hell. RENT the cylinders.... im paying $8 a month per cylinder. beats paying $500 for them upfront.
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Old 06-15-2014, 05:21 PM   #15
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1ST day out playing, and I think it could use a regear and a couple of inches of lift. Who ever above said welcome to the addiction was absolutely correct... Loved every minute of it
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Old 06-15-2014, 05:49 PM   #16
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Nu, enjoy the addiction !!!! As fun as it is expensive.
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Old 06-15-2014, 08:36 PM   #17
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Hey OP, it is very addicting. I can keep your addiction going. I sell lifts, bumpers, wheels, tires, exhausts, lights and pretty much anything you could want. If ever you want anything, shoot me a PM whenever you get a hankering.

-Dan

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