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'96 Outback Catalytic Converter Questions


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Chapter 2 in the repair saga for my 1996 Legacy Outback with 2.5l engine and auto transmission: Along with my transmission woes, I also have to contend with a Check Engine light -- P0420 (cat converter not up to spec). With nearly 200K miles on the original cats, I am not surprised. But in order to make this thing able to pass its next emissions test (coming up in October) I have to sink some serious $$ into replacement cats. Frugal as I am, I wonder would it really be necessary to replace both the front and back converters, or if relacing only one would do? If so, which one would likely provide the most improved emissions performance, front or back? Any thoughts or recommendations from you guys on this?? Thanks!

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