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Savvy/Currie Aluminum Control ArmsRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits ZONE 4.25" combo lift for TJ available at Rockridge4w

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Unread 05-09-2011, 04:50 PM   #16
HighLonesome
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Every 'performance' muffler I've ever heard is a good bit louder than stock.

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Unread 05-09-2011, 05:46 PM   #17
Kolak
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The large case Magnaflow is deep-toned but nice and mellow. I use them all the time in my Kolak Exhaust for people who want something more subtle.

Quote:
Originally Posted by ScottyGunn View Post
How loud is the Magnaflow? I use this rig hunting so I don't want to scare off everything in the woods, lol.
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Unread 05-09-2011, 08:24 PM   #18
mrfixit95zj
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I purchased a cat-back sysytem from rockauto.com, and it was about $120, also has a $75 mail-in rebate. It a good deal, My was the 4.0 engine. It like getting a complete cat-back system for about $40 bucks.
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Unread 05-10-2011, 05:11 AM   #19
ScottyGunn
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Quote:
Originally Posted by mrfixit95zj View Post
I purchased a cat-back sysytem from rockauto.com, and it was about $120, also has a $75 mail-in rebate. It a good deal, My was the 4.0 engine. It like getting a complete cat-back system for about $40 bucks.
Did you get the SS system? How was it to install? Are the pipes mandrel bent?
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Unread 05-11-2011, 08:49 PM   #20
mrfixit95zj
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no, its aluminized, and not mandrel bent, but its a dynomax system. for the money with the rebate, you can't go wrong !!
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Unread 05-12-2011, 08:26 PM   #21
98gczj
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dont mean to hyjack, but I was thinking about replacing my muffler with a flowmaster 40 series has anyone ever done this? dose it sound good?
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Unread 05-17-2011, 01:54 AM   #22
Coolhand20th
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Originally Posted by 98gczj View Post
dont mean to hyjack, but I was thinking about replacing my muffler with a flowmaster 40 series has anyone ever done this? dose it sound good?
lots of people in the WJ's use them and love them. They are a bit louder then the 70 series though. I know Youtube has some videos up there of a WJ with a 40 series flowmaster on them. But IIRC those were 4.7's.

Recently though there was a discussion on exhausts in the WJ section and someone posted a video of theirs with a 4.0 and Kolaks exhaust on it.Sounded damn good. Link is below

http://www.jeepforum.com/forum/f310/...aster-1211168/
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Unread 07-20-2011, 07:12 AM   #23
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You can do all you want to the exhaust...you aren't going to get better gas milage. I have two 5.2L jeeps and the best they get is 14MPG (average). The AWD and the fact that they have a permanently engaged front axle is why they get horrible gas milage. The magnum engines in any vehicle are not known for fuel economy. If you still need a good inexpensive exhaust, Iron Rock Offroad sells a system that you can pick and choose your components starting around $150.
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Unread 07-20-2011, 09:23 AM   #24
Midnightluckey
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Quote:
Originally Posted by harveyr1
You can do all you want to the exhaust...you aren't going to get better gas milage. I have two 5.2L jeeps and the best they get is 14MPG (average). The AWD and the fact that they have a permanently engaged front axle is why they get horrible gas milage. The magnum engines in any vehicle are not known for fuel economy. If you still need a good inexpensive exhaust, Iron Rock Offroad sells a system that you can pick and choose your components starting around $150.
Nothing to do with awd. Even if you get a part time tcase, your gas mileage won't go up. Unless of course you've got bad ujoints, bad vc, etc that could be killing the mileage.

Do what I did about my gas mileage; give up.
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Unread 07-20-2011, 10:26 AM   #25
HighLonesome
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The I6 with 225x75x15 street tires and 242 TC will do the best. I've heard of 20+ mpg freeway.
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Unread 07-20-2011, 10:26 AM   #26
Derph
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Quote:
Originally Posted by Midnightluckey

Do what I did about my gas mileage; give up.
you can make it look pretty so you get warm fuzzy's when you look at it!
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Unread 07-20-2011, 01:22 PM   #27
AlphaLorde
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This is so

However, its all in how you use the skinny pedal. Ive hand calculated(well cell phone) high 16s for the past few tanks. But I have some things to make it breathe better. But that will go down when I get my 4.56s in.

My old 4.0 when stock I got around 21-22 on trips up north, about 140 miles one way, on cruise control 60mph or so.

Gas engines are most efficient cruising(even power), and least when accelerating(changing/using power)
Electrics motors are the direct opposite.
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