I have an 02 Pontiac Grandprix GTP with the Bose 8 speaker system in it and i want to install my headunit(Pioneer DEH-P7700MP) and i want to put my subs and amp in the car. I want to know if i need to bypass the stock amp(which only powers the 6x9's in the rear), and if so what hardware do i need, and how do i do it. I've put systems in cars before so i know how to wire the headunit and such but i've never put a system in a car that had a stock amp, so i need to know if i need to bypass this one, since it only powers two of the speakers, and if i do need to bypass it i need to know how to do it. Any help you guys can offer would be awesome.Thanks.