Iv been prowling the forums for a while now, but never actually posted. I was wondering if the 2008 pioneer premium stereo had an output for an amp/subs in the back of it. I searched, but cant seem to get a straight answer. I'm also going for new rims. The ones i want are attached below come in 17 and 18 inches. I can take the 17's off my car now and just throw 18's on right? thanks!