I believe the tweeters are 1inch. and any tweeter out there wont fit right in, you have to mod em up a little bit, meaning with wood or some other material. Best thing would to disconnect the factory ones and then put some new (any size) into the A pillars on each side either facing you or not. If you know how to fiberglass your in good luck, have em pop out a bit pointing to the rear of the truck, if u dont know how to fiberglass, just cut a certain hole in the A pillar and stick em in with a cover over them.. good luck