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Old 05-01-2006, 04:38 PM   #1
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Cat-Back Exhaust kit

My muffler kicked the bucket when I went offroad this past weekend. I really need a cheap cat-back kit because I feel like a jerk driving around without a muffler. I found a flowmaster kit on eBay store called "Performance Curve" for only $115. Only thing is that it says that it's for 01-04, but I don't see why it wouldn't fit on my 2000. Other companies make kits for 97-99 and 00-06, so wouldn't this kit fit on my car? Can anyone tell me if there would be a reason this kit wouldn't fit on my car? I really need to get one soon. I emailed the guys selling it but they haven't replied. Thanks.

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Old 05-01-2006, 05:45 PM   #2
Knows a couple things...

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The last time I heard a Flowmaster on a Jeep it made the Jeep sound more like a ricer Mitsubishi.

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Old 05-01-2006, 07:30 PM   #3
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i heard a clip of a 40 on a 4.0 and ricer its defenitely not

granted it a grand but it's the same engin as in ouer wranglers and it sounds sick
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Old 05-01-2006, 09:57 PM   #4
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i bought the cheap cat back that summit sells(though it's for my 2.5) and i like it. dynomax, maybe. cant remember. sounds good on my 2.5, i think.
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Old 05-02-2006, 07:39 AM   #5
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Yeah, I had a dynomax muffler on before and I just got their cat-back kit off of Jeg's. In case anyone needs anything, Jeg's is offering free 1-2 day nationwide delivery.
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Old 05-06-2006, 10:54 PM   #6
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bull crap...it definitely DOES NOT make a jeep sound like a ricer (unless maybe its the 2.5) cuz i have the 40 on my 4.0 and it sounds MEAN! it sounds so sick and awesome...i went to a muffler shop and paid 146 dollars which got me a 40 series muffler, a 3 inch tip, and it included labor...(it used the stock pipes which is ok...the kit your looking at uses stock pipes anyway)
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Old 05-08-2006, 06:39 PM   #7
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So I have a 2.5 in my jeep and I want to put in exhaust will the 40 series sound like a pissed off bumble on my jeep? If so what would give me the best sound?
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Old 05-08-2006, 08:45 PM   #8
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Who cares about sound....A flowmaster would let it exhale a whole lot better. That's what is important!
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Old 05-08-2006, 09:22 PM   #9
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Of corse performance is important that is why I have done the recent mods that I have but.... If a dynamaw or borla or banks muffler would sound better then I want to go with them!
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99 Jeep wrangler 4-banger w/ 63" throttle body and spacer and the intake mantifold milled out. Flowmaster 40 series Cat-Back Exaust.With 31x10.50 BFG AT's.
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Old 05-08-2006, 09:26 PM   #10
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khenderson] when you put the 62mm 4.0 throttle body and spacer on your 2.5 did you experience your jeep getting more sluggish because mine dosen't accelerate as fast between 45-65 mph like it used to. Keeping in mind that mine is an automatic! If anyone else has had this problem and remidied it lit me know how you did it please
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99 Jeep wrangler 4-banger w/ 63" throttle body and spacer and the intake mantifold milled out. Flowmaster 40 series Cat-Back Exaust.With 31x10.50 BFG AT's.
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Old 05-08-2006, 11:19 PM   #11
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Well, I put the dynomax kit on my jeep the other day and it sounds great on my 4 banger. My friend was driving behind me and he said that it sounds like a 6 cyl and not a ricer. I am also pleased with the performance. I had a dynomax muffler on before but I did not have a tailpipe. I would not recommend this. Having the mandrel bent tailpipe now feels smoother and more powerful than it did before. This kit is nice, it's got good tone and you can hear it in acceleration but it is quiet while cruising.
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Old 05-09-2006, 04:12 PM   #12
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Cool i have looked into dynamax quite a bit and it seems like the one to go with. I am hopeing that new exhaust will free up my my engine because due to my recent mods it feels congested. What route did you go as far as the cat? Is it just a universal one? What would happen if I just hollowed out my origional?
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99 Jeep wrangler 4-banger w/ 63" throttle body and spacer and the intake mantifold milled out. Flowmaster 40 series Cat-Back Exaust.With 31x10.50 BFG AT's.
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Old 05-09-2006, 09:47 PM   #13
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I've been there and done that when it comes to finagling exhausts on jeeps and I would recommend that you not hollow out your cat, especially on the newer ones with emissions control systems. I have a universal hi-flow cat, you can get them cheap on eBay (I got mine from Performance Curve, they're good). For the O2 sensor, just cut out a section of pipe with a sensor fitting on it either from your old pipe or from one at the junkyard and get some connectors from an autoparts store to fit it into your system. Also, if your jeep has a few miles on it, it might be a good idea to get a new O2 sensor. If you have a bad one, it can really muck up your jeep's performance.
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Old 05-10-2006, 10:05 AM   #14
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personally i prefer flowmaster because it has more of a rumble instead of a sports car sound...and it gives you good performance and you get good performance gains and it lets it breathe good
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Old 05-10-2006, 01:52 PM   #15
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bigjeep-do you have a 6 or 4 cyl? Also which 40 series do you have, the standard,super or the delta flow 40 series muffler?
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99 Jeep wrangler 4-banger w/ 63" throttle body and spacer and the intake mantifold milled out. Flowmaster 40 series Cat-Back Exaust.With 31x10.50 BFG AT's.
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Old 05-10-2006, 03:06 PM   #16
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i have a 6 cylinder but i have heard the 4 cylinder with the flowmaster 40 series and it sounds pretty good and mean.....and to answer your question about which 40 series i have...i do have the 40 series BUT i dont have either of those three i have "The Original Flows" original 40 series...if you want more info go to www.flowmastermufflers.com and you will see a picture of a black muffler on the right side with a heading above it that says "Fluggers Classic Two Chamber Muffler" or something like that...and mine is pretty much exactly the same as that...that muffler is supposed to sound like the old original "original flows" so it is designed just like the original flows so thats why i say mine is pretty much the same ( because i have the actual "original flows" and that muffler is designed to be the same as "original flows") but i would probably reccomend either the one i have or the standard or delta...not the super 40 for a 4 cyl...delta will be deeper but probably more like an import sound(if you have 4 cylinder...if not either of those three is fine but if its the six u can get the delta without worry of import sound)...standard wont be as deep but it will sound less like an import...p.s. the reason i say i have the 40 series is cuz the "original flows" is a 40 series muffler...it is the "original" "original flows" Muffler but it is a 40 series...if it isnt called "original flows", it is called "original 40 series"...so it is a 40 series...it just isn't one of those that u listed...sorry its so complicated...get back to me if u have anymore questions
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Old 05-13-2006, 03:07 AM   #17
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I just posted this on the other thread but what the hell...give the banks a listen. Here's the page for the write up. Banks Exhaust
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Old 04-03-2007, 07:43 PM   #18
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btw why did you have to unbolt the hanger by the tail pipe in that write up? I couldnt get my stock catback with out cutting it... How do you remove it?
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Old 04-06-2007, 04:53 PM   #19
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Well here's the update.. the 2.5" pipe that i had in stock doesnt fit right so i will have to look for another one. While i had my rig on the lift i unhooked the stock tailpipe and cut it (on an angle) right by the last hanger. It sounds much nicer when you are stepping on it. I want to see how it will sound with the 2.5 but if its not the curiosity id live it how it is.. it sounds good
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