I'm sure that you've all heard the term "gutting your cat" thrown around by high performance freaks. What is it and why bother? Supposedly, a cat (even in good working order) places a restriction on the exhaust flow. Less air out equals less power. Conversely, if we can somehow get rid of that restriction, we should make more power.
Let it be known that messing around with any part of your emissions system will void your warranty and worse yet, get the cops all over you! I take no responsibility with what you do with this information. I only place this on my web site for informational purposes. I neither recommend nor suggest that you perform this procedure on your car. With that said, a doctor friend wrote this awesome guide on how to properly gut a cat. Read on...
"First, for humane purposes, ensure that the cat is dead. If you find a cat allready dead, i.e., Road Kill Cat, so much the better. Next, obtain a board larger than the cat. Attach the cat to the board belly up, with the limbs tied out spread-eagle. Make an incision from the pubic symphysis up to the sternum and left to right under the rib cage. Retract the skin and muscle layers, exposing the peritoneal....
"Oh, that wasn't what you had in mind? Well, how about this (off road use only): remove the cat. Get a large hunk of round steel, like say, one inch, or whatever you have laying around. Take large hammer and pound through cat. Repeat until all the expensive platinum honeycomb stuff is no longer inside the cat, but is now residing on your driveway. Put cat back on off-road-use-only vehicle. Stay out of California. Stay out of Houston (roving sensors)."