Just had new, hi-flow cats by Magnaflow installed on my truck thinking it was the source of power loss issues in my 05. No such luck, still had erratic idling, going from smooth to rpms dropping to the point that the truck shut down.

I started hearing a metallic rattling under the truck and accidentally hit the gas getting out of the truck to locate the source and suddenly the truck smoothed out, no fluctuations. I walk to the rear of the truck and found this, the insides of my new cats.

I wonder how Magnaflow is going to handle this one. By the way, Denso coils suck. Out of the eight I installed, half were bad.

 

Dang?????

Must have been "dropped real good" at some point in their life.

I'd think they'd stand behind that.