$4200 with a few caveats. Audison, (upgrade level 10) makes the complete sound system, (fixed pricing for the most part) that integrates to the current system, coax/components/a-piller, misc bits pieces/parts, installed and professionally tuned. I also had them add the sound dampening in the doors while they were in there. I wanted to keep it looking stock and the 10" sub fits perfectly under the rear passenger seat.
Just to be clear, there are some here that insist I could have done this myself, "NOT", I wish i had the skills and know how. i would rather pay someone to do it right the first time. plus i got a warranty on all the work which took 3 days.
Link below will take you to all the component specs.
http://www.audison.eu/spc-kit/?kit=639&model=23&brand=4&chassis=77&y=29&type=4
I'm sure others can do it but I used an authorized dealer/installer
I also changed over my music streaming service to Tidal and for a complete novice that made a world of difference to my ears