I have a 99 GS and was able to use all teh OEM mouting brackets, covers, etc. with my Infinity components. I did have to "shave" down the sides (plastic part) of the Infinity tweeter to make them fit into the OEM mounting bracket, but with a little work, they fit in there nice and tight and went back into the door - just like stock. Are the Sony tweeters bigger than others, maybe? Good luck!