Time to replace the catalytic converter

[Big Al]

My 2003 3.7 L has had the P0420 since I purchased it a month ago. Mechanic says I need a new converter. So is there 3 Cats on this Jeep.
Buy OEM or has anyone had good luck with aftermarket ones.

 

[tommudd]

02-early 03 have 3 , 04 on has two
OEM is best, a lot of the aftermarket do not flow as well as stock MOPAR

 

[Big Al]

So, need to get it scanned to find out which one is at fault I guess.
How much if I DIY.
How much if I take it in to it.
Should I do everything from the manifolds to the tail pipe, (tail pipe and muffler has holes in them) or just do the single failing cat.
My build was 09/02, 3 cats I guess.

 

[LibertyTC]

The OEM cats are best, but very expensive.
The lesser expensive option, would be the Walker Cats.
There are some threads where members have used the walkers, with good success.

 

[LONGJEEPOWNER]

I just put a set of Walkers on my 2010 Jeep Liberty and the work fine so far. Replaced the whole Y pipe which goes to the muffler.

 

[LONGJEEPOWNER]

Amazingly enough the scrap money I received from the old ones was enough to pay for the bill new ones!