Mine will be gone before long.

 

Those things look nasty. Truck must have alot more of power now.

 

Oh mama! How many miles on those cats before that happened??? ...what kind of "punishment" have they been taking?

 

Just 67,000 miles on the cats. I have just a N/A 4.8 with some bolt ons and a cam. An Ultra Flow muffler, and factory manifolds. It gets really hot here and when the ambient temp. started to go up (around May), things started to get shakey.

I think it was mainly the un-burnt fuel hitting them from the overlap of the cam. I've heard hot starting on is really hard on cats too. I doubt that was it, but it probably didn't help.

 

did you check your head gaskets after all of this. i would and do a compression test and a leak down just for previntive sakes.