Hey guys i was wondering as to the difficulty of putting in an amp and sub into the 8 without the bose system. Ive searched for stock radio and sub but all i got were threads about the bose system. What about the 8s with sport packages!!! it will have no bose and so info is scarce on this, unless i missed it somewhere. if you have links htat would be great. also im looking the price range of about $500 if any of you guys can help me out on suggestions that would be great too.

Yeah, just use a line-output converter to connect your RCA Cables.

Have you looked at the self powered subs on the market. I find the infinity sub is pretty good, 10" 200w I think.

Its pretty simple install, 12v power/ground, remote on and tap into one of the speaker ch.