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Unread 12-16-2015, 09:13 AM   #1
Sandrunner
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Exhaust system

I have a 2004 wrangler rubicon with 4.0 6 cylinder. I am wondering who has the best ( least restrictive )
Exhaust system on the market today. I want to let it breath a little easier.

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Unread 12-16-2015, 09:51 AM   #2
Ross
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Quote:
Originally Posted by Sandrunner View Post
I have a 2004 wrangler rubicon with 4.0 6 cylinder. I am wondering who has the best ( least restrictive )
Exhaust system on the market today. I want to let it breath a little easier.
I have just a magna flow free flow cat and pipe turned down just after the skid so I suppose that would not be very restrictive. It offers no benefit other than not having my muffler fall off again and a little more space under the Jeep.
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Unread 12-16-2015, 10:28 AM   #3
biffgnar
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Quote:
Originally Posted by Sandrunner View Post
I have a 2004 wrangler rubicon with 4.0 6 cylinder. I am wondering who has the best ( least restrictive )
Exhaust system on the market today. I want to let it breath a little easier.
You are chasing a benefit that doesn't exist in this application.
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Unread 12-16-2015, 08:00 PM   #4
joe_jeep
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The best system is the cheapest one.

If you want top quality, spare no expense, the borla 2 piece header system is very nice.
A quality cat back system after that, will sound nice, and flow great.
The banks cat back sounds very nice imho.
that is over 1k dollars right there. For 3 to 5 horsepower at best.

performance wise they will do very little to give you power.
My first jeep had a header, an empty cat, and a 2.5" cat back system.
it sounded cool. It was a little lighter. It gave me some extra room under there.
Thats about all it accomplished.

it is your money, enjoy it how you like, but they are not worth the money.
the factory system is not hurting you any.

I can see adding a nice small muffler, like a flowmaster to the stock system.
it would b smaller, lighter, and sound decent. Jmho.
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Unread 12-16-2015, 08:46 PM   #5
BadJohnny
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My original muffler had a hole in it and I swapped it out. I don't mind what I did back then, it has decent sound, but looking back after a few years I wish I would have went with O.E. -- I would recommend you keep the stock set up, but if you are dead set on changing it give Kolak a call, you can also look up his posts on this forum.

Info from his Forum signature:

Kolak Performance and Offroad
Member: Specialty Equipment Market Association
Telephone: 480 998-3661
kolak@aol.com or kolak@kolakperformance.com
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Unread 12-16-2015, 10:22 PM   #6
Maverickxeo
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Mine has a magnaflow muffler on it from the PO... Ive had the jeep for 5 years or so now, and its still holding up.

Of course, no real power gains, but I like the sound of it.
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Unread 12-16-2015, 10:47 PM   #7
Gagewebb
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Honestly I'd just take it to a muffler shop and have them custom bend it from the cat back. Single or y-pipe out but you'd def want it all the way back or you'll be smelling fumes. Cheapest way to do it 'legally.' And itll sound good. Local muffler shop did my cj7 from the headers back with a new cat and single dumped at the rear axle for $275. Exhaust systems are overated.
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Unread 12-17-2015, 12:10 AM   #8
Knuckelhead
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Quote:
Originally Posted by Sandrunner View Post
I have a 2004 wrangler rubicon with 4.0 6 cylinder. I am wondering who has the best ( least restrictive )
Exhaust system on the market today. I want to let it breath a little easier.
The OEM exhaust system will meet all of your needs. If you want to modify the cat back, don't do a turn-down after the transfer case as it creates a droning noise on the road (reflected off the pavement under the Jeep) and blows up dust on the trail which anyone behind you wont appreciate.
Keep the OEM style exhaust that runs past the rear axle and you can do a turn-out to give you better clearance than the low hanging OEM tail pipe:
... HTH
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Unread 12-17-2015, 04:35 AM   #9
Sandrunner
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Thanks

Thanks for all the advice. Sounds like stock is good in this case. Sounds like you all saved me some time and money.
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Unread 12-17-2015, 08:01 AM   #10
Ross
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Quote:
Originally Posted by Sandrunner View Post
Thanks for all the advice. Sounds like stock is good in this case. Sounds like you all saved me some time and money.
After my tummy tuck I need a smaller muffler so I went with a flow master delta 40 super flow or something like that. I sounded fine, but because of the changed angle in my exhaust after the tummy tuck ever couple years something would break on my exhaust so now I have just the Cat and a small tail pipe just past the skid. I could have change a hanger or something to fix my exhaust but my jeep isn't a daily driver and I am not sitting in traffic with a stupid sounding vehicle annoying others. If I were I would fix it the right way.

There are legit reasons to change your exhaust but trying to pick up more power or better mpg isn't one of them.
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