Alright I want MB quart speakers for my mustang and the sizes it fits are 6 by 8's and mb quart doesn't have 6 by 8 speakers that are 3 way only 2 way i was either thinking of getting those or trying to fit in 6 by 9's by cutting around the old factory crap that were 3 way so i can get better sound quality. I don't want to get the 6 by 9's and then find out that even if i do cut around the old factory stuff it wouldn't even work b/c my car isn't designed to fit this size of speakers