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Ok, my mechanic says I have at least one clogged cat, maybe two. He also said I have a total of Four cats in my Expy. I was looking online and I can get replacement OEM style (Eastern) cats for about $250.00 aside.
My questions are -
Has anyone tried to replace the OEM cats with the universal? The universal at Autzone are almost 1/4 the cost.
Where are there four cats?
Also, should I change out the 02 sensors.
And yeah, I believe the problem is from a misfire.
That's HOT!