This adapter is advertised as a 5.25, 6, 6.5 to 6x8 but comes as a 5.25 to 6x8. To make a 6.5 speaker fit you need to cut the plastic. This would not be too bad if the adapter was made like a stereo install kit, where the pieces are made to break off to fit a variety of sizes. But this adapter is one solid piece with no perforations or guiding lines or marks to make the resizing in any way easy. As another poster has said, if I wanted to do this much work to make an adapter fit I would have saved my money and made one myself. To sum up, don't buy this if you are expecting a 6 or 6.5 speaker to fit, it won't, it will work fine for a 5.25, and therefore gets 2 and not 1 star.