4th order bandpass help plz

[Basshead1980]

Hi guys sorry if this topic is played out. I really need some help designing a good spl 4th or 6th order box designed for my sub. Some say my sub doesn't like a sealed box so I'm not sure. It's going in a 04 impala as. Running 3 batteries 0 gauge everything currently on a skar rp2000.1d. I already have a great sq box, but I'd like to be able to switch out boxes when I really want to ground pound. Can someone help a guy out? Thanks

[deafboncemarquis]

the ebp of the woofer says 4th order all day!!