Not sure how this might apply but I did not have to remove the rear seat only the plastic panne covering the speaker (be carefull you can crack or break off the clips). Then it was just a matter of unscrewing the speaker, I beileve 2 screws. If you stick to a 4x6 it should be a r & r proceedure as long as the depth is good. Anyway I used Alpine 4x6's in mine and was very happy!

Good Luck!l