Good day group, has anyone decatted a R3T cat box? Is it simply a removal and hollow out with a drill, or does the cat box need to be cut open and rewelded?
The cat box is empty. Buy a crossover from Paul Bryant (Viking Exhaust) and replace it. You can do a search here for many posts about Paul and his exhaust building.
I don't think they can be drilled out easily. IIRC someone years ago posted that they used a very long drill bit and removed them from the exhaust end. And then there is this: Another Way to "Skin the CAT"