jon71203

hey guys,
its high time i replace my cat and muffler on my 97 cherokee 4.0.
are there any write-ups around on how to replace these?
wondering...thanks a ton.

COSXJFAN

Cat back exhaust system, such as Magnaflow, or Gibson. At that point it's a bolt on process. To just replace the cat is a weld on procedure, and unless you know how to weld, would have to be done at a shop. There are no "clamp on" type cats to my knowledge. HTH!!

Long Island XJ

i just got a clamp on style cat from magna flow.
http://www.quadratec.com/products/51410_102_07.htm
its listed as a YJ part but its the same 2 1/4 inlet outlet needed. in fact jon you can buy all needed parts from quadratec. HTH

COSXJFAN

I was under the impression that clamp on type cats were unavailable, thanks for the heads up!!

LeeVenHawk

I'm due for a new cat also... I have too many thumbs to weld muffler pipe... please update with how the bolt on worked. Good Luck.

Long Island XJ

I replaced my whole X system. Went to my local NAPA and picked up new down pipe with new foil cone gasket, 02 sensor, tail pipe and 5 new 2 1/4 clamps(two for the cat, two for the muffler and one on the hanger out back) The link above is the cat i went with. You could see right throw it. As for the muffler I bought a Hooker from my friend (later that night I picked up a real one too HAHA just kidding) Whole operation went pretty smooth. Except my x manifold is now cracked. The PO tack welded the the two nuts on to the damn studs for the manifold. We had to cut the nut off and then use a air hammer to knock them out. Which cracked the manifold. But I think it was going on its own any way. Just one more thing to keep fixing and loving every second of it.

jon71203

i just took a peek underneath the jeep and i'm not sure what the flange bolts are you're talking about and it looks as though the hangers for the cat and the muffler have been welded into place. is that right?

RenoXJ

I replaced mine.. super easy. Just get a direct fit from magnaflow. fits perfect, and yes it is clamp on.

jon71203

can someone post a pic of the flange bolts....i'm not sure what i'm looking for...

RenoXJ

On the replacement cat there are no "flange bolts" the 2 bolt flange you are talking about ( i think ) is the pipe coming off the exhaust manifold. so if you are replacing that then there are 3 things you need to buy. the head pipe, the catalytic, and the exhaust system. all which are vehicle specific to your xJ. the cat is magmaflow, and the other pieces are made by walker dynomax. HTH

jon71203

what i'm asking is what bolts do i need to undo to get the cat out?

smtippin

I did it the easy way and went here: http://www.jeep.com/en/owners/
After putting my VIN in, I found there was a recall on my CAT and the Stealorship did it for free. Course I didn't get a high flow cat or anything, but the price was right.

s

okcjeeper

You can also get bolt on cats that use the stock flange mount. My magnaflo is a direct bolt on to the stock factory flange.

jon71203

i have some hangers that come down, almost like a hook that the cat and muffler hang on. it looks as though they're welded on or something, is that normal????

Long Island XJ

the hanger your talking about is welded on to the down pipe. And it slides into the tranny mount. A little PB lets it slip in and out like warm apple pie.