I have an 04 GT that I'm thinking about putting headers on and a cat-less H-pipe. I just want to know whats involved in the installation of shorty headers? Will I have to take the motor mounts apart and jack the motor? I'm a mechanic, just want to know what I'm up against from people that have installed them. Also, which brands have the best product or you like the best? Where can I find a cat-less H-pipe and not an X-pipe? Thanks in advance.