Hi I got impreza 1998 and need to know front and rear speaker sizes please want to up date them thank you

 

Better to post in ICE, more informed answers.

I have a 98 car, the speakers are 13cm front and rear, circular.

Fronts can be fairly easily upgraded as far as 165mm by the use of spacers, either home made from mdf, as I did, or using Corsa C ones which are supposed to work.

Rears can go to 9x6" as I have done, again, either spacers or some fairly difficult work mounting them under the rear shelf. Mine are on lozenge shaped spacers with grey ICE fabric over it, matching the rear shelf.