New muffler question - JeepForum.com
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post #1 of 25 Old 08-18-2017, 01:48 PM Thread Starter
lkvisser
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New muffler question

Thinking about adding a magnaflow muffler to my 4.0, (have laying around). From what I read, most free flowing mufflers aren't too loud on a jeep. I'm just hoping for a little more tone, while driving.
The question is, what's the easiest way to do it? I haven't read anyone cutting the exhaust before the cat and after the muffler, and sliding it all out. Switch mufflers, and slide back in place and fasten?
Anything wrong with this theory?
Thanks for the help!!
Lance


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post #2 of 25 Old 08-20-2017, 12:43 PM Thread Starter
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Any help out there?

Thanks


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post #3 of 25 Old 08-24-2017, 08:09 AM
Ross
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I would take it to a shop and have them weld it in.

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post #4 of 25 Old 08-24-2017, 08:31 AM
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I like my Magnaflow sound. Not too loud but lets people know when I'm in a parking garage.

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post #5 of 25 Old 08-24-2017, 08:33 AM
biffgnar
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It's been awhile since I looked at a stock exhaust, but I believe there should be a flanged connection with bolts between your cat and muffler. The muffler and tailpipe come off. Problem tends to be that the bolts in that flanged connection can get very rusty. If that happens you may have to start cutting. If you cut the flanges off a band clamp can be used to connect the pipes.
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post #6 of 25 Old 08-24-2017, 08:44 AM
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Quote:
Originally Posted by lkvisser View Post
Thinking about adding a magnaflow muffler to my 4.0, (have laying around). From what I read, most free flowing mufflers aren't too loud on a jeep. I'm just hoping for a little more tone, while driving.
The question is, what's the easiest way to do it? I haven't read anyone cutting the exhaust before the cat and after the muffler, and sliding it all out. Switch mufflers, and slide back in place and fasten?
Anything wrong with this theory?
Thanks for the help!!
Lance


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If the magnaflow you have is the right size, inlet and outlet and the inlet and outlet are in the correct position you simply measure and cut the pipe and install. If you can weld do so. If not clamps are fine. It's usually easier if you remove the tail pipe first. I would not mess with the flange as the bolts will probably break and you will more than likely have to get a new seal.
I've had my flowmaster clamped in for 10 years with no issue.
The sound will be just fine. The exhaust note from a 4.0 is pretty soft.

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post #7 of 25 Old 08-24-2017, 08:59 AM
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Save yourself some money.


I had my factory muffler removed 10 years ago and put a cheap glass pack on............still going strong.


A nice deeper tone and not that loud, also less back pressure.

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post #8 of 25 Old 08-24-2017, 09:17 AM
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Hushpower muffler by Flowmaster in all my 4.0l's

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post #9 of 25 Old 08-24-2017, 09:55 AM
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Here is a pic of my setup. Just had it out to replace my RMS. I cut it before the rear cat. I believe it's the Flowmaster HP2. Sounds good, not to loud but enough to make you get in the throttle a little more. The turn down is just after my UFC UHC TT. I don't think I can get it any more high clearance then this.
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post #10 of 25 Old 08-24-2017, 09:58 AM
jeep'd
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Oh, I think I paid about $115 for the muffler on Amazon. And a friend that owns a muffler shop installed it for free.
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post #11 of 25 Old 08-24-2017, 10:09 AM
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Quote:
Originally Posted by jeep'd View Post
Attachment 3445530

Here is a pic of my setup. Just had it out to replace my RMS. I cut it before the rear cat. I believe it's the Flowmaster HP2. Sounds good, not to loud but enough to make you get in the throttle a little more. The turn down is just after my UFC UHC TT. I don't think I can get it any more high clearance then this.
How the heck did you get to the flange bolts holding the pipe to the manifold? I couldn't get a socket on those, even with a u-joint adapter and long extension.

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post #12 of 25 Old 08-24-2017, 10:11 AM
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Originally Posted by Deuxlatch View Post
even with a u-joint adapter and long extension.
They are gettable this way from below. Keep trying.
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post #13 of 25 Old 08-24-2017, 10:12 AM
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I started from under neath with the flex joint, when putting them back it, I couldn't hit the same angle and actually found that if you remove the rubber flap(rear two plugs) it opens up enough room to get a wrench in there.
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post #14 of 25 Old 08-24-2017, 10:13 AM
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Sorry the rubber flap in the wheel well.
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post #15 of 25 Old 08-24-2017, 10:15 AM
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I'm also running a 1.25" BL and 1" MML.
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