I put 6.5's in the front of mine, I just used a bracket I got from Crutchfield.com and you can put 6x9's in the rear even though it only comes with 6.5 back there stock. You can either use a dremel tool and enlarge the opening or you can buy speaker pods from infinity equipped eclipses from a junkyard. I bought mine from msrecycling.com, I paid a grip for mine but thats because they had the speakers in them as well (didnt know that when I paid for them), so if you order from them make sure you tell them you just want the pods

Toney
'97 RS 5 Speed (totaled)
15.4606@88.42 Mph
96 Toyota Celica GT
88 Toyota Supra NA-T (w/ sports package)
Got Boost?? Hell yeah I-6 turbo powah baby!