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Re: What does TWC+TWC mean?
Posted to Emissions Forum on 6/11/2014 3 Replies

I haven't ever seen that. From what I know 2 cats started on the 99 4runner 3.4L and 2000 Tacoma 3.4L but they are both in line underneath the truck.

I too have wondered about that TWC+TWC and one cat on my 96.

Thomas Login to read more.

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