putting a cai on a y7 is a waste of $200.

first of all, the biggest thing is the way the TB and IM is shaped. Its vertical instead of horizantal.

my suggestion if you want a cai is at least swap the y8 IM and then get one for an EX. You'd see more gains, even if you just threw a short ram on there.

BTW, short ram = more low, mid range
cai = more high range.

you see "gains" regardless.

maybe consider a mini-me swap, or a full ex changeover. You'd see even more gains.