Ok, so I had an idea of how to do my box for my next build. I am driving a 2002 Grand Prix and am buying the seats of an 04+ Grand Prix so I can have fold down seats, but the trunks in these cars are a bit smaller than those in the 04s so I am worried about being able to get the 4-4.5 cubes I need for these subs with port and sub displacement.
So I came up with an idea. The idea is to use "external" aeros for the box that would fire up through the 6x9 opening. Since I will be pulling that rear deck "lid". Now comes the issues with the idea. First is getting the required port length needed to reach my tuning, especially since I have no idea how long they need to be to get that tuning. Second is getting them in there and secured with no real way to do it outside the car since they will be semi-external.
The subs of choice are gonna be 2 12" DC LVL4XLs. So any help would be appreciated, or if it is certain I will be able to do aeros firing down the driver side instead, or do a big slot port there.