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Old 08-13-2012, 07:27 PM   #1
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Most powerful and aggressive tone!?!?

ok i am deciding whether or not to glass pack my 1998 Jeep tj 4.0 i6, but will this make my jeep sound loud and aggressive, or like a dirtbike? and if i shouldnt get this, than what should i get that is also not very expensive?
also guttin it, takin off the cats, or straight-piping aint a choice lol

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Old 08-13-2012, 07:47 PM   #2
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Go to Sears and get a nice set of tools. Then get a Service Manual. Then get dirty. Learn to do the work yourself and save a bunch of money. Forget the pipes. The 4.0 will never sound like a v8.

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Old 08-13-2012, 07:54 PM   #3
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You want something loud? Just replace that factory muffler with a single in dual out Flowmaster 40 series muffler. Doesn't sound anything like a V-8 but it has a good loud growl for a 6 cylinder. My TJ has one and I wouldn't ever do it again but it was fun when I was younger. Hell, you can hear that thing coming from a few miles away. Don't waste your money on anything else more than a muffler on a 6 cylinder exhaust system. The price of that muffler plus install won't be anymore than several hundred bucks.
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Old 08-13-2012, 07:55 PM   #4
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yeah but like what i'm askin is what is a good cheap exhaust. but thanks TexasT, u still helped
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Old 08-13-2012, 07:59 PM   #5
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You want something loud? Just replace that factory muffler with a single in dual out Flowmaster 40 series muffler. Doesn't sound anything like a V-8 but it has a good loud growl for a 6 cylinder. My TJ has one and I wouldn't ever do it again but it was fun when I was younger. Hell, you can hear that thing coming from a few miles away. Don't waste your money on anything else more than a muffler on a 6 cylinder exhaust system. The price of that muffler plus install won't be anymore than several hundred bucks.
ok yeah thanks i was thinkin about gettin a flowmaster.... now all i need is the money
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Old 08-13-2012, 08:04 PM   #6
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ok yeah thanks i was thinkin about gettin a flowmaster.... now all i need is the money
Wish I could post a video to let you hear it but I'm still overseas at the moment. It doesn't sound "dirt bike" like or like a 4 cylinder Honda at all. I can't even remember the exact cost because it was installed so many years ago but it wasn't very expensive at all.
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Old 08-13-2012, 08:10 PM   #7
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A good cheap muffler that sounds good behind the 4.0L is a Thrush glass pack... a brand that was even popular when I was a kid driving my '57 Chevy back in the mid-60's.

I had to have my exhaust reworked after installing a long-arm suspension and the shop installed a Thrush glasspack muffler which while it sounded really good, was a bit too loud for my tastes. They installed a slightly larger Thrush muffler which was quieter but still had a good deep rumbly sound. I'm an old guy used to V8 engines and even to me my 4.0L engine sounded pretty good with that Thrush glasspack muffler. And its sound when connected to the 4.0L engine is not even close to the ratty sound of a ricer car.

Thrush has a cool logo too that hasn't changed since I was a teenager in the sixties.

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Old 08-13-2012, 08:11 PM   #8
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Wish I could post a video to let you hear it but I'm still overseas at the moment. It doesn't sound "dirt bike" like or like a 4 cylinder Honda at all. I can't even remember the exact cost because it was installed so many years ago but it wasn't very expensive at all.
ok its all good. and the reason i said dirtbike is my friends i4 truck is glasspacked and sounds like a ricer but thanks a lot for the help
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Old 08-13-2012, 08:13 PM   #9
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A good cheap muffler that sounds good behind the 4.0L is a Thrush glass pack... a brand that was even popular when I was a kid driving my '57 Chevy back in the 60's.

I had to have my exhaust reworked after installing a long-arm suspension and the shop installed a Thrush glasspack muffler which while it sounded really good, was a bit too loud for my tastes. They installed a slightly larger Thrush muffler which was quieter but still had a good deep rumbly sound. I'm an old guy used to V8 engines and even to me my 4.0L engine sounded pretty good with that Thrush glasspack muffler.

Thrush has a cool logo too that hasn't changed since I was a teenager in the sixties.

ok thanks a lot ill look into some of the Thrush mufflers.
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Old 08-13-2012, 08:18 PM   #10
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No problem Norris. Good looking rig you got there man. Keep us updated on what you do and your results/opinions.
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Old 08-13-2012, 08:25 PM   #11
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No problem Norris. Good looking rig you got there man. Keep us updated on what you do and your results/opinions.
ok i will and thanks for the jeep compliment it really means a lot comin from a fellow jeepster
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Old 08-13-2012, 08:36 PM   #12
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Banks muffler, you can watch exhaust sound clips on you tube
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Old 08-13-2012, 08:43 PM   #13
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Banks muffler, you can watch exhaust sound clips on you tube
ok thanks ill look it up
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Old 08-13-2012, 08:44 PM   #14
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Banks mufflers = way overpriced. WAY overpriced, at least in my personal opinion.
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Old 08-13-2012, 08:51 PM   #15
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Banks mufflers = way overpriced. WAY overpriced, at least in my personal opinion.
yeah they are above my minimum wage budget anyway lol.
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Old 08-13-2012, 09:20 PM   #16
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I6 with straight pipe = pissed off bumble bee. Drop in a v8 then spend money on a great sounding exhaust.

Keep the I6 quiet. Not worth it to sound crappy.

Just my opinion. I like my stock exhaust on my I6. I also have a 300 I6 in an F150 I've had since high school. Had glass packs, 3 inch straight pipes, dual exhaust, turndowns, beat out cats. I tried everything all sounded crappy and annoyingly buzzy and load.

Just my experience. I'd you want Loud exhaust go for it!
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Old 08-13-2012, 09:20 PM   #17
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Check your local laws

Don't know about where you live, but here in Maine, it is almost impossible to get a inspection sticker with a glass pack on. They havent been legal here for ages. Can still be done, but you have to know someone who will put their inspection license on the line for you.

On another note, I have had good luck with Thrush Turbo mufflers in the past for what its worth.
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Old 08-13-2012, 09:31 PM   #18
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Don't know about where you live, but here in Maine, it is almost impossible to get a inspection sticker with a glass pack on. They havent been legal here for ages. Can still be done, but you have to know someone who will put their inspection license on the line for you.

On another note, I have had good luck with Thrush Turbo mufflers in the past for what its worth.
yeah i live in thomasville, nc and you can buy em in local stores and stuff. i think they are legal and a lot of my friends got em. idk ill look it up i didnt even think about that
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Old 08-13-2012, 09:33 PM   #19
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I6 with straight pipe = pissed off bumble bee. Drop in a v8 then spend money on a great sounding exhaust.

Keep the I6 quiet. Not worth it to sound crappy.

Just my opinion. I like my stock exhaust on my I6. I also have a 300 I6 in an F150 I've had since high school. Had glass packs, 3 inch straight pipes, dual exhaust, turndowns, beat out cats. I tried everything all sounded crappy and annoyingly buzzy and load.

Just my experience. I'd you want Loud exhaust go for it!
ok thanks yeah thats one thing i was worried about is overdoin it and sounding like the engine is bout to blow
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Old 08-14-2012, 08:29 AM   #20
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Personally i've run the same exhaust on both my jeeps and love the way it sounds. Kinda an entire system though. CAI, throttle body spacer, shorty header, remove cat straight pipe, Flowmaster super 40 series, turn downs behind muffler. The resonance at highway speeds is tolerable...but a Magnaflow muffler will give you the same sound with less resonance. Either way it sounds good for a 6. Putting a snorkel on my current one so the CAI will be leaving for that project. Keeping a tail pipe with a tip will also move the resonance to the rear of the Jeep but i prefer not having to route the pipe. Everyone has their own opinions on this so you will see alot of diversity in this area. Personally i like to hear the exhaust when im giving it hell.
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Old 08-14-2012, 08:33 AM   #21
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Personally i've run the same exhaust on both my jeeps and love the way it sounds. Kinda an entire system though. CAI, throttle body spacer, shorty header, remove cat straight pipe, Flowmaster super 40 series, turn downs behind muffler. The resonance at highway speeds is tolerable...but a Magnaflow muffler will give you the same sound with less resonance. Either way it sounds good for a 6. Putting a snorkel on my current one so the CAI will be leaving for that project. Keeping a tail pipe with a tip will also move the resonance to the rear of the Jeep but i prefer not having to route the pipe. Everyone has their own opinions on this so you will see alot of diversity in this area. Personally i like to hear the exhaust when im giving it hell.
how much would all this exhaust system cost? and yeah me too i want people to know im comin when im drivin down the road lol
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Old 08-14-2012, 09:10 AM   #22
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Banks mufflers = way overpriced. WAY overpriced, at least in my personal opinion.
Like everything else they sell.
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Old 08-14-2012, 11:13 AM   #23
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Don't know about where you live, but here in Maine, it is almost impossible to get a inspection sticker with a glass pack on. They havent been legal here for ages. Can still be done, but you have to know someone who will put their inspection license on the line for you.

On another note, I have had good luck with Thrush Turbo mufflers in the past for what its worth.
The real turbo muffler is the dynomax...
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Old 08-14-2012, 11:16 AM   #24
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Like everything else they sell.
I'm big in the diesel community so naturally I dislike banks. Their parts fail commonly, and gale lies through his teeth.

If you want real diesel performance go see PPE diesel. They do bar none work.

Go dynomax turned down before the axle n call it a day.
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Old 08-14-2012, 11:26 AM   #25
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Go to a junkyard with a sawzall and start climbing under all the trucks you can find. I found an almost brand new Flowmaster 40 on an old bronco and bought it for $10 after I cut it off. I've been very happy with the tone the 40 puts out, and for $10 I couldn't be happier.
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Old 08-14-2012, 11:38 AM   #26
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I agree with Jerry....hence I am super happy with the sound and price of the Thrush Welded.

Dynomax 17651 Thrush Welded Mufflers by Thrush Mufflers

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Old 08-14-2012, 12:26 PM   #27
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Go to a junkyard with a sawzall and start climbing under all the trucks you can find. I found an almost brand new Flowmaster 40 on an old bronco and bought it for $10 after I cut it off. I've been very happy with the tone the 40 puts out, and for $10 I couldn't be happier.
ok yeah i havent even thought about doin that. thats a good idea
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Old 08-14-2012, 01:04 PM   #28
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ok i am deciding whether or not to glass pack my 1998 Jeep tj 4.0 i6, but will this make my jeep sound loud and aggressive, or like a dirtbike? and if i shouldnt get this, than what should i get that is also not very expensive?
also guttin it, takin off the cats, or straight-piping aint a choice lol
Do you trail ride with 4x4 groups a lot? Cause if so you may not want to make it too loud. I for one would get a bit ticked off if I had to creep around the woods all day with a loud ass Jeep right in front of me.

Just a thought.
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Old 08-14-2012, 01:36 PM   #29
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Banks mufflers = way overpriced. WAY overpriced, at least in my personal opinion.

The TJ I bought had a banks muffler on it. I don't think it would have been my first choice. Had flowmasters in the past, but on v-8's that sounded awesome.
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Old 08-14-2012, 02:49 PM   #30
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Everybody here is right, never gonna sound like a V8. I have to run a free flowing exhuast because I installed a blower on my 4.0L. I have tried the flowmaster 40 series-Loud. 50 series better but still loud. Currently have a stainless Magnaflow, sounds good, idleing, very agressive under acceleration but again, Loud. I just had the exhaust shop order in a flo-pro diesel muffler for a cummins. should have it on this weekend. I'll let you know how it sounds.

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