k, first off, im dansgts, owner and admin of allgencelica.com. ive got a 86 celica gt-s with a lot of mods to it, but thats beside the point of this thread. my sisters got a 91 corolla dx that needs alot of help...last year for her b-day i got her a head unit and installed it for her, but the car desperatly needs new speakers. front and rear are stock and the rears are blown to shit. my question is what size are the speakers in the front and rear, and what can they be expanded to hold easily, ie not too much cutting or modifying metal parts on the car. i may just get her the stock sizes, but i know that can be streched a lil to hold better speakers, well, mainly something that has a lil bass to it rather than all highs

any help would be appreciated