A:Answer They usually quote longer install times because some installs need to use wiring that they need to splice into your harnesses, and those installs take much longer, today they have something called a T-Harness and that is usually plug and play but you have to purchase that separately, if you didn’t the installer may have just given it to you making the install time much much shorter and a preserved the integrity of your vehicle. Wish you the best of luck.