We have no emmissions testing here so I have been tossing the idea of slicing off the cat's for awhile now. I have heard that they are fairly restrictive and lossing them will give a bigger power bump than even the nicest header and exhaust combo out there, anyone know what kind of gains could be expected? Anyone hear an 05 GT without the cat's and if so was it to loud (if there is such a thing:naughty )? Lastly anyone know if it would void the warrenty? Thanks in advance for any input:drink: .