to be honest the one in the fender (looks like a giant gernade) is a bitch to get out. There is a screw behind the ABS for the brakes that has to be removed to get the resonater out. Otherwise the ones in the engine comparment near the air box are easy. But to be honest with you when I did this it really didn't do anything, no performance gain, not louder, nothing just time spending wrenching and then I dropped a damn socket into the engine that ended up in a low control arm and made an annoying rattle till I got it out.