The front speakers will be 6 1/2`` and the rear are 6x8 for hatchbacks.6x9s can be added with some custom aluminum strip brakets and grinding out the hole a little.
In the doors its 6 1/2" The dash is 3 1/2" The back is 5" x 7" I just replaced all of my speakers in my 1989 convertible and it sounds amazing!
6x8
what size speakers fit in a 1989 Toyota cressida
6.5"
The standard size for Rear speakers and Door speakers is 6X8 or better known as 5X7
The front and rear speakers according to the Metra Electronics Fit Guide are 6x8".
4 inch speakers. mayrequire modified fit. use www.crutchfield.com.
You are going to need 5 1/4 (5.25") for the front doors and the tailgate. These jeeps only have the 4 speakers.
20 gallon
15 gallon
i believe they are 6x81/2 or 6x8.5
According to my Chilton's Auto Repair Manual : A 1989 Ford Mustang has a ( 15.4 U.S. gallon gas tank )