if u have this (my) car with the optional sub with the exeption of those with a production date in april, i belive 2 bolts only hoiling it down(dont rip out/carefull of electrical wire harness). dissconnect harness,using a small flat-head screw driver unlock wire terminal in harness comming out of the box u swap both greens and both blacks (green1-black3 same side of harness and green2-black4 other side) ur sub will hit noticable deeper and more powerfull


{ 1g 2g } <---before(on sub box) after----> { 3b 4b }
{ 3b 4b } { 1g 2g }


*(no signs of wear/blow-outs)