Message: 3.9 v-6, manual tranny. Front left cat is toast... Right one probably isn't far behind... Some of the after market y pipes show not front cats. What happens to the o2 sensors? If I decide to just weld in a couple new cats in the old y pipe, any recommendations on the replacement cats? Truck's got 152k and goin strong. Paid for itself a few times over... BTW, first post. Only just found out about this site... Thanks in advance.
Worktruck
P 1
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Subject: bad cat.