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Unread 03-14-2015, 10:05 AM   #1
CurtG
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Stock muffler and sound wanted

I want to replace my exhaust system with whatever is stock sounding (read as I want quiet not rumble)

Muffler and a cat will be installed and I think I will have it all welded, stainless pipes and muffle is ok cost is not a issue....low sound is.

Part numbers and brand would be greatly appreciated or point me to brand and model type.


The recent exhaust thread got me going to do mine. I don't want that rumble like most of the guys like...low sound is important.

Thanks
Curt

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Unread 03-14-2015, 10:15 AM   #2
keith460
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Even though I have the Thrush Turbo muffler on mine, and have used for years, NAPA as well as others sell a Quiet Flow muffler for about a 100 bucks. Part# EXH 22339

I may change to this in the spring.
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Unread 03-14-2015, 10:25 AM   #3
CJ7VFR
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I also have the Thrush Turbo Muffler on my 1985 CJ-7, with the 150 AMC 4 cyl engine.
It is just made from regular steel, and is not stainless.


I picked this muffler for a few reasons such as it is a lot cheaper in price, but mainly
because it is almost the exact same size as the stock muffler that came with the Jeep.


It sounds nice, is not loud at all, and fits in the stock location very well. I was even
able to attach the factory heat shield to it just like the heat shield was attached to the stock muffler.


Here a generic picture of one of the turbo mufflers for your reference:




If you want all stainless, I think Walker makes a stainless muffler that is close to
the size and shape of this one, and as Keith says, they have them in a Quiet Series.


The only problem I see with most stainless steel mufflers is that most of them are
made for the aftermarket crowd, and they are usually made to be more free
flowing, and as a result they are usually a lot louder than stock, as this is
what most aftermarket buyers want.


But I am sure with a little research, you'll find what you want.


Jim
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Unread 03-14-2015, 11:30 AM   #4
seabass1858
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I have the thrush turbo muffler, stock everything else and I was able to hear the radio while driving to az going 80 through Texas and I wasn't def by the time I reached my destination
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Unread 03-14-2015, 11:39 AM   #5
CurtG
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what catalytic converter should I use?

Thanks for the muffle advice!
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Unread 03-14-2015, 11:42 AM   #6
cwig12
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Quote:
Originally Posted by seabass1858 View Post
I have the thrush turbo muffler, stock everything else and I was able to hear the radio while driving to az going 80 through Texas and I wasn't def by the time I reached my destination
I have the same one and it's not bad at all. I too can listen to the radio, the price was the big selling point for me but it turned out to be a good buy either way.
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Unread 03-14-2015, 11:44 AM   #7
cwig12
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Originally Posted by CurtG View Post
what catalytic converter should I use?

Thanks for the muffle advice!
I'm pretty sure any stock style Catalytic converter will work, I don't think there is much difference between them all. Just price and the name that's stamped on them. Aside from maybe being CARB rated if you need emissions.
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Unread 03-14-2015, 12:00 PM   #8
Goodtohave
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I am in a similar situation, I want to change my exhaust, all stock.

I am finding the smell of the exhaust is bugging me (I am getting old)..

My CJ7 is an 81 and here in Canada there was no Catalytic but I think adding one will get rid of some of the smell...
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Unread 03-14-2015, 12:08 PM   #9
cwig12
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It wouldn't hurt smell wise. Is your exhaust pipe cut to the right specs? That makes a huge difference.
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Unread 03-14-2015, 02:42 PM   #10
Erik719
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Quote:
Originally Posted by CJ7VFR View Post
I was even able to attach the factory heat shield to it just like the heat shield was attached to the stock muffler.
You wouldn't happen to have a picture of the stock heat shield on the muffler would you?
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Unread 03-14-2015, 03:56 PM   #11
Goodtohave
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Quote:
Originally Posted by cwig12 View Post
It wouldn't hurt smell wise. Is your exhaust pipe cut to the right specs? That makes a huge difference.

Yes it exits the back just in the right place, an inch in either direction makes a huge difference on our trucks...

I also have to try to lean out the carb, it runs rich.
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Unread 03-14-2015, 07:24 PM   #12
CJ7VFR
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Quote:
Originally Posted by Erik719 View Post
You wouldn't happen to have a picture of the stock heat shield on the muffler would you?
No I don't have a picture at the moment. My Jeep is in pieces right now!
I am doing a massive rust fix up on it!!

The stock muffler heat shield was originally welded to the muffler if I recall correctly.

Once the stock exhaust rusted away, I was able to cut the heat shield off, and there
was enough of a flange left on each end (front and back) that I was able to use some
metal pipe hanging straps to secure it to the Turbo muffler similar to how a muffler clamp
works. Only ALOT bigger!

I toyed with the idea of welding the heat shield onto the Turbo muffler, just like it was on the stock muffler, but
most of the inexpensive mufflers, like the Turbo, only last a few years, and if that was the
case, then I would be cutting it off and welding it again and again and again.

My father actually suggested the pipe hanger metal strips. They are very flexible, are only about
an inch wide, and have holes in them that run the entire length of the strap, about 2 inches apart.
This made bending them around the muffler and cutting them to the right length easy. Then I just
put a nut and bolt on each strap to secure the heat shield to the front and back of the muffler.

When the Turbo muffler rusted out, all I had to do was take off the nut and bolts holding the straps,
pull of the heat shield, and put in on the new muffler.

Jim
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Unread 03-14-2015, 07:57 PM   #13
only in a jeep cj
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[QUOTE=CJ7VFR;28912161
The stock muffler heat shield was originally welded to the muffler if I recall correctly.
Jim[/QUOTE]

Can't say for the older CJs, but the later ones used brackets and U bolts to attach the two heat shields to the system. I know this for sure.
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Unread 03-15-2015, 03:08 PM   #14
CJ7VFR
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Quote:
Originally Posted by only in a jeep cj View Post
Can't say for the older CJs, but the later ones used brackets and U bolts to attach the two heat shields to the system. I know this for sure.
I bought my CJ-7 used, so if what you are saying is true, then maybe someone welded
the stock heat shield to a replacement stock muffler. I bet somewhere along the lines
someone may have lost any brackets or what-not that held the heat shield on and didn't want
to go thru the trouble of buying new brackets and just welded it instead.

Ah, the world of owning old Jeeps! You never know what your gonna get!

Jim
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Unread 03-15-2015, 03:11 PM   #15
nosheep
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we installed a dynomax catback and manaflow high flow cat on my girlfriends XJ with good results little deeper then stock but cant tell inside.
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