Best and cheap route without removing them yourself is at Americancustom.com. You can buy gutted stock head pipes, and the gutted stock mufflers are awsome. The major heat is gone, the Os sensors fit right in, the sound is great and the power does go up a bit. If you are going to remove them yourself, cut the header in half at the front chamber weld with a hacksaw blade, or band saw. The cat material they use now in not like the porcelin stuff they used in the old days. It's metal, and a pain to get out.