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Unread 06-16-2008, 06:51 AM   #1
Luckyduck
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Report: FlowMaster 40 series installed!

There have been lots of threads about what exhaust to put on your 2.5 Wrangler. Yesterday I finished installing the FlowMasters 40 series and a new cat. I got the muffler for a bit under $80 from JC Whitney and the cat for $45 of Craigslist. After 5 trips and 8 stops at 2 different auto-parts stores I got everything I needed to get it installed and it was in. The install was not hard just time consuming going to the parts store.

So the sound: Well with no cat or exhaust it was deafening! With just the cat and muffler it was still pretty loud, then after adding the tailpipe it was a good sound. It is not too loud and much better than stock.

Power: I have not driven it enough to tell that much yet but I got some back. I dumped a thing of fuel injector cleaner in last night and I am leaving for a 120ish mile trip in a few minutes which will be a good test for it.

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Unread 06-16-2008, 06:28 PM   #2
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Woops it fell off today! dam not I gotta put it back on!
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1993 Ranger 2wd - dd
1999 wranger 2.5 - it gets used for something
1978 international scout - being built
1998 Cherokee sport 4.0 auto
1957 CJ5 - restoring back to stock http://www.jeepforum.com/forum/showt...54#post5168554
Bikes:2000 Ducati Monster 900: 2001 CBR 600 F4i: 1980 CB 900
my build http://www.jeepforum.com/forum/showthread.php?t=550786
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Unread 06-16-2008, 08:54 PM   #3
jeepnmike
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Quote:
Originally Posted by 1999jeep View Post
Woops it fell off today! dam not I gotta put it back on!
Thats why you get it welded on....
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Unread 06-17-2008, 07:43 AM   #4
Luckyduck
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I can not weld yet...
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1993 Ranger 2wd - dd
1999 wranger 2.5 - it gets used for something
1978 international scout - being built
1998 Cherokee sport 4.0 auto
1957 CJ5 - restoring back to stock http://www.jeepforum.com/forum/showt...54#post5168554
Bikes:2000 Ducati Monster 900: 2001 CBR 600 F4i: 1980 CB 900
my build http://www.jeepforum.com/forum/showthread.php?t=550786
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Unread 06-17-2008, 08:44 AM   #5
Jetscuh
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Get someone to weld it for you then. If you were closer I know someone who could do it for you and do it well but Worcester to where I am might not be worth the drive for you since it is about an hour-ish. However if you are interested you can send a PM my way.

I thought about putting that exhaust on my TJ. The XJ has it and it is pretty damn loud but I guess it would be even louder on my TJ so I was considering the hush power so it would give it more of a throaty sound without it blasting the garage door off. However I have never heard a 40 on a 4.0 TJ....

Last edited by Jetscuh; 06-17-2008 at 06:42 PM..
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Unread 06-18-2008, 06:05 AM   #6
wendell
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I've often read that opening up the exhause on the 2.5 can result in loss of lowend. So on my 02 2.5 wrangler I left the exhause alone. I needed all the lowend I could get. As for the 40 series, in my experience this muffler tends to resonate insde the vehicle at certain rpm,s. Might not be as much of an issue on a jeep, with the top off you hear everything any way. Between the wind and the muffler should about make your sterio useless without a kick butt system I would think. Let us know if you do loose some lowend or not, I'm curious about that. They say it helps the 6, but hurts the 4.
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Unread 06-18-2008, 08:33 AM   #7
Brads_nky_yj
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so how loud would a 40 be on a 4.0 with no cat? That is an idea I have had floating around in my head lately.
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Unread 06-18-2008, 11:30 AM   #8
Luckyduck
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I almost got it on again. I put JB weld and prayed it would hold. My bank account is not doing so hot after loaning out almost $1500 I also need close to $200 in repairs on my motorcycle because of a stupid nail. Anyways I hope it does not take away my lower end power. It is not too loud and has a pretty good rumble (for the 1 mile I drove it ) Hell if this does not work I will take it off and put it on the XJ which is the 4.0.
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1993 Ranger 2wd - dd
1999 wranger 2.5 - it gets used for something
1978 international scout - being built
1998 Cherokee sport 4.0 auto
1957 CJ5 - restoring back to stock http://www.jeepforum.com/forum/showt...54#post5168554
Bikes:2000 Ducati Monster 900: 2001 CBR 600 F4i: 1980 CB 900
my build http://www.jeepforum.com/forum/showthread.php?t=550786
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Unread 06-18-2008, 12:56 PM   #9
atomicmoose
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JB Weld, seriously?

Just go get it welded on before you hurt yourself or someone else.
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Unread 06-18-2008, 03:27 PM   #10
Jetscuh
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In my above post I offered some welding.


The XJ has a 4.0 and a 40 and I think it sounds pretty damn good. I am just curious on how it would differ on a 4.0 TJ since there are some differences in exhaust set up and overall length I believe. This leads me to think it would be louder on a 4.0 TJ. However, I have no clue.
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Unread 06-18-2008, 05:27 PM   #11
Luckyduck
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Quote:
Originally Posted by atomicmoose View Post
JB Weld, seriously?

Just go get it welded on before you hurt yourself or someone else.
How is any one going to get hurt? The box said some people fixed a Cat engine using this stuff.

Anyways the exhaust is on now. I just did a VERY small loop around the woods next to me and it almost died in 4 high going up a steep incline, but after it made it up i hit a tree so I had to try again I did it in 4 low this time and made it no problem. The exhaust sounds great at the lower rpms.
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CentralMass4wd.com

1993 Ranger 2wd - dd
1999 wranger 2.5 - it gets used for something
1978 international scout - being built
1998 Cherokee sport 4.0 auto
1957 CJ5 - restoring back to stock http://www.jeepforum.com/forum/showt...54#post5168554
Bikes:2000 Ducati Monster 900: 2001 CBR 600 F4i: 1980 CB 900
my build http://www.jeepforum.com/forum/showthread.php?t=550786
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Unread 06-19-2008, 02:47 PM   #12
atomicmoose
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Quote:
Originally Posted by 1999jeep View Post
How is any one going to get hurt? The box said some people fixed a Cat engine using this stuff.
When you are flying down the highway and the exhaust falls off and goes through someone's windshield, that's how.

Don't be stupid. If you cannot afford to get your rig fixed right, don't own a car.
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Unread 06-19-2008, 02:53 PM   #13
Brads_nky_yj
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Quote:
Originally Posted by atomicmoose View Post
When you are flying down the highway and the exhaust falls off and goes through someone's windshield, that's how.

Don't be stupid. If you cannot afford to get your rig fixed right, don't own a car.
wow!! nice answer MOD.
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Unread 06-19-2008, 02:55 PM   #14
atomicmoose
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wow!! nice answer MOD.
I didn't flame him. I am merely trying to get him to see the err of his ways.
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Unread 06-19-2008, 02:58 PM   #15
Brads_nky_yj
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I understand, people dont always do things the right way, but you just sounded a little harsh lol
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