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Re: F150 3.5L Catalyst Failures
Posted to Technical Discussion Forum on 1/9/2024 1 Reply

We may ask the muffler shop to see if they can look at that when they warranty the converter. Just for curiosity more than anything. Nonetheless, the upstream and downstream are mirroring each other so I'm going to recommend he get the catalyst warranted. It's... Login to read more.

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