Well Thursday my 3rd cat should be arriving for install. Just seeing if anyone else is on thiers or any ideas why they dieing quick.

04 50k miles

So far 3 dead battterys, 2 starters, 1 water pump, 1 intake manifold, 1 coil, 1 set of plug wires, 16 spark plugs, 2 cats, 2 rear wheel studs and a partridge in a pear tree.

 

You mentioned 1 coil... is that literally ONE coil or one set of four coils?

 

I agree all should be replaced if one goes. The others could be taking out your cat.....and plugs......and power.......and mileage....and engine....etc.