well im not too sure if that would be the correct term for them, but i was wondering on the sizes for the speaker mounting holes for the stock 8 speaker system i hav

i believe that the indash speakers are 4"
the door speakers are 6"
the tweeders i am uncertain
and the rear speakers are 6x9"

is this correct, i am curious just so i know how much work will be involved in installing my sound system once i purchase it

i plan to hav 6.5" speakers in the doors and the rear parcel shelf, shud this be any trouble or easy fit?

Tweeters are generally 1", just about everyone has 6.5" splits installed in their front doors so there shouldn't be much of a hassle and rear x9's should slot in if you go that way, although if you're getting a big woofer you may as well go 6" or 6.5" 2ways for the rear fill and let the sub do the bass thing.