Hey guys new to the cobra scene, just picked up an 04 and it already has a 2.8 richard racing pulley, along with a predator tuner, however I want to get the car dyno tuned and make sure its safe etc..., before I do this though I want to put on billitflow four piece idlers and a new belt either gates or gatorback. How hard is it to put these idlers on, and what size belt do I need to go with. I also plan on doing catback, off road h, and a jlt intake before having it tuned. Thanks,.... oh and prob plugs which ones should I get and what should the gap be, and one more q, I wont need a new tune if I then do a heat exchanger and a radiator will I? My goal after these mods is to do subframes, irs work, then just go with a kb, tb, mass air, injectors etc...all at once down the road...