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Old 04-16-2009, 12:44 PM   #1
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Air intake / exhaust

I've been looking for a good aftermarket intake and exhaust. What combinations work well together and can it gain the kind of hp increase and gas mileage the aftermarket world claims. It makes sense to me but just dunno. I,ve ordered rock rails, trailer hitch, wiring harness and now looking at the intake and exhaust..........When does it all stop?
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Old 04-16-2009, 03:56 PM   #2
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From what I have read extensively, the exhaust systems on Jeeps (unlike my previous experience with high-end sports cars) doesn't really come off that great. Cold air intake is a possibility but I would personally be worrying about the dirt/dust/water from actually using the Jeep offroad and not just mall shopping. Most people like the K&N filters for a step up, but I am ok with the Mopar with proper maintenance. I would install a snorkel before a custom intake.

I personally (this comes from a ex-SCCA Vette Champion who adores speed and performance) would spend the $ on a nice Teraflex BB lift. Do you have an X --- what gears are you running? You might be limited to 1000# on that towing capacity. I guess I see the Jeep as what it is....a mighty wonderful 4wd machine and not just another Xterra, 4runner, or Tahoe.....

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Old 04-17-2009, 12:33 AM   #3
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The jeep for now is used for a daily driver so not that concerened about dust for now but it will be used for off-roading in the future so a lift is a given. It will only be used off road now if I have to rescue my husband in the rzr. The jeep is a X with 3.73 axle and towing compacity of 3500lbs. This is what it tows.
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Old 04-17-2009, 08:01 AM   #4
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If you have the time, there has been some in-depth threads on both these topics.
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Old 04-17-2009, 08:26 AM   #5
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From my experience with a setup like this (I ran a business building high-performance vehicles for years), due to the low backpressure in the stock exhaust, a catback will only make power up top on the JK, which is bad for low-end torque, which is what you want in a truck. Simply bolt on a muffler if you want the sound, performance, and in the JK, increased clearance.
As for the intake, if you live in a wet area (don't know TN that well, I'm afraid), I'd highly reccommend either just a K&N filter, or if you must go CAI, get a Volant, or other box-style intake, to help keep water out. They're not much more $ than an open-cone style, and the reduced chance of hydrolock makes that worth every penny- Mark W.
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Old 04-18-2009, 05:02 PM   #6
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i have a cai (forget which one) and had a custom exhaust made at a local place and i think it helped a little. my exhaust is a thrush muffler (similar to a flowmaster 40) tha is moved where the evap canister used to be .
13 WK2 hemi-tow duty
92 YJ-woods duty
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Old 10-25-2012, 03:31 PM   #7
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I'm leaning heavily towards the Airaid intake, which can be both open and sealed for off roading and the Gibson Stainless steel dual exhaust muffler setup. Roughly $600 shipped on Amazon for both. Both are bolt on and seem pretty simple to install.

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