Need CA Cat

I have searched the internet for catalytic converters for my 1998 Legacy Outback.
I am getting the ODBII code for catalytic converter bank1 being
inefficient - P0420.
Is Bank1 the front? Or must I replace both?
I have read in this group that <800 can buy a pair of CA cats, but all I find online is the Subaru site selling them for $2000/pr.
I am guessing a muffler shop will be able to help me for less, but I am frustrated with the lack of online info.
Please tell me where I can get CA legal cats which I will not have to replace for a while.
Thanks!
--Dave
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First replace the O2 sensors. Will have to anyways and more times than not, new sensors will "fix" the problem. Use antiseize on the threads.
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How many O2 sensors are there?
Two? Or more?
Non-turbo 2 cat Subaru system.
Thanks!
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On Thu, 25 Jun 2009 14:20:07 -0700, Dave wrote:

420 can be a LOT of things: Cat, O2 sensors, even a clogged vacuum line.
Before you go spending a lot of money on parts, spend a little time checking things out...
I found a clogged vacuum line after 2 O2 sensors...
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OK, I think more info will help...
1998 Legacy Outback 180,000+ miles
Based on what I have read, it looks like the front O2 sensor is fine, the rear/post cat O2 sensor could be slowing down.
The "before" O2 sensor slowing would trigger another code, the after one might not.
I can see the before, I will have to go hunting for the after...
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Thanks for the info so far!
Question: Is any welding required to replace the cats? It looks like I might be able to do this myself with a little ingenuity. I know the nuts will not be easy, but I would probably choose to crack them off anyways.
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On Fri, 26 Jun 2009 15:12:53 -0700, Dave wrote:

Cats are usually bolted in, but on Toyotas they may be welded. If it is a welded system (usually the welded system is from the cat back to the muffler) you can cut the welds, flare the front pipe or adapt a new pipe, AFTER placing the clamps on the pipe, of course! and get a universal cat that will fit.
Most Toyotas (Oh, SNAP! Wrong group!!!) er, Subarus have a y pipe that comes into the cat and then the rest of the system attaches to that.
Subarus usually have 2 cats, a forward and an aft. Here in Mass we have what's called 'California emissions', meaning the environuts got a hold of the legislature and adopted the CA standards. I have an '89 GL Coupe and when we put the exhaust on we 'skipped' the rear cat. The car passed emissions with almost new-car readings on one cat! However, if they put the car oon the lift and you only have one cat you're going to have to add it back.
Good luck!
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