Yes! the roof is the worst. After a lil while of hard bassing the roof cross supports will start to separate from the roof. Once this happens they start to slap each other and make a loud noise. Plan on using lots of sound deadener to prevent this. Good luck!
Ur gonna need some beeffy tens and more power. Check Audioque.com. 4 sdc2.5s on 1 2200d should be louder
Just make sure to wire it to 1/2 ohm and upgrade ur electrical