Has anyone drilled/knocked out the cats from their intact, non-leaking headers? If your headers don't leak, but you want them to run cooler and eliminate a failure point, it might be nice to remove the cat. While I've seen this done on motorcycles, those have a straight, relatively easy access to drill and chisel their cats. The F430 headers would require more contortions to get all the cat material out. And I know people with leaking headers have cut the heat shields off, cut the manifolds open to remove the cats, then welded everything up again. I've also read that there's a shop that does that, but I can't find who. Does anyone know? I have leaking headers, but I can see they leak from a warped flange (I have a machining center that can fix that) and I'm not sure they are leaking internally (but I'll test them and find out). I'm weighing all the options, including just installing aftermarket. But I'd like the sound to change as little as possible (yes, I know it will be louder/different without the cats) and it's kind of nice to stay OEM, if you can do so minus the destroy-your-engine debacle. Thanks for any help.