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Old 03-09-2012, 09:40 AM   #1
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Lowering the catalytic converter after tt

I am wondering if you can lower the catalytic converter after a tummy tuck. The muffler and the catalytic converter is touching the bottom of the jeep tub.

I see the catalytic has a hanger attached to it but where would I mount it and how can I lower it?

Thanks

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Old 03-09-2012, 10:48 AM   #2
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You do have a body lift?

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Old 03-09-2012, 10:50 AM   #3
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Remove skid.
Remove trans mount bracket from transmission
Cut the exhaust hanger off halfway down.
Determine where it needs to be in order to set the exhaust neutral and mark.
Drill a hold through the section you cut off and the remaining section.
Bolt them together and reassemble.

The hanger determines the height, obviously. You need to lower it....that's the easiest way to go about lowering it.

Here you go:
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Old 03-09-2012, 12:15 PM   #4
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Quote:
Originally Posted by Redsand View Post
You do have a body lift?
Yes, it has a 1.25" BL and 1" MML.
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Old 03-09-2012, 12:19 PM   #5
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Quote:
Originally Posted by Imped View Post
Remove skid.
Remove trans mount bracket from transmission
Cut the exhaust hanger off halfway down.
Determine where it needs to be in order to set the exhaust neutral and mark.
Drill a hold through the section you cut off and the remaining section.
Bolt them together and reassemble.

The hanger determines the height, obviously. You need to lower it....that's the easiest way to go about lowering it.

Here you go:
This is what I was looking for...thanks for your visual. I will try it this weekend.

BTW...did you have to modify your exhaust pipes from the outlet end of the muffler? Mine is rubbing the right rear shock. I have the Banks monster exhaust if that helps.
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Old 03-09-2012, 12:38 PM   #6
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I did mine just like that. Hopefully dropping it will cure the problem with contact with the shock. The UCF LO-Pro mount shows this technique in their install instructions.
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Old 03-09-2012, 12:41 PM   #7
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Quote:
Originally Posted by oIIIIIIo View Post
This is what I was looking for...thanks for your visual. I will try it this weekend.

BTW...did you have to modify your exhaust pipes from the outlet end of the muffler? Mine is rubbing the right rear shock. I have the Banks monster exhaust if that helps.
That picture is old. My exhaust is pretty modified....my rear cat clogged (late model TJ's have two pre-cats and 1 main cat with no oxygen sensor interface) so I cut the exhaust in front of the cat and welded up a new setup with just my Dynomax muffler (slightly louder than stock, I don't like loud) and a downpipe after the skid facing down and toward the driver's side for minimal noise and fumes. I added another rear exhaust hanger at the actual turn-down in order to fully support the exhaust so it doesn't move. I made the hanger using the ~1/2" support rod I cut off the original exhaust where the cat used to be (you can see it in the picture) and the bushing from an extra trans mount bracket I had laying around. Works great, is high clearance, simple, and not very loud. No fumes or tub/skid contact. That's what you want.
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Old 03-09-2012, 12:45 PM   #8
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I did my exhaust similar to your's. I have triangulated long arms that make it almost impossible to route an exhaust pipe through them and took all the room of the stock muffler. I moved the cat more than a foot forward and have a thrusher muffler where the cat was with a downturn right after the skid. Ended up having to cut the exhaust hangar off the mount to fit it.
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Old 03-09-2012, 01:00 PM   #9
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oh my, I may have to take it to a muffler shop to do all this. I don't have a welder nor know how to weld.

Right now the muffler is up against the tub and the vibrating it, bugging the hell out of me.
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Old 03-09-2012, 01:08 PM   #10
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You don't need a welder to do that. You need a drill and a bolt. Lower the exhaust hanger like I told you. Don't freak out, just use common sense.
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Old 03-09-2012, 01:15 PM   #11
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x2 we modified our exhausts for other reasons. Lowering the mount will be easy and might just solve both your problems. Also a lot of exhaust mods can be done with a sawzall, exhaust couplers and a bunch of clamps.
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Old 03-09-2012, 01:23 PM   #12
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Ok, I will give it a try this weekend.

I can hear my wife now..." What are you doing to the Jeep now?"
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Old 03-12-2012, 02:42 PM   #13
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Imped...do you have more pictures of how your was done to lower the catalytic converter? Is the picture upside down from your last posted picture? Thanks
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Old 03-12-2012, 02:46 PM   #14
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That picture is right side up taken from the front passenger side of the skid. I'm confused as to why you're confused....it's straight-forward.
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Old 03-12-2012, 03:02 PM   #15
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Ok...I was looking at it from the rear of the skid which threw me off. So you cut black piece that is mounted underneath the tc and not the one welded to the cat? Thanks

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