Avital ADD-ON Remote Start Module for Aftermarket or OEM 4003PP - 4003 Series PLAIN PAK - No retail packaging This is NOT a 4003L. It is a 4003PP. The differences are described in the "Description" section below. PP" means Plain Pak. You will not got a box that has 4003PP printed on it. You will get a box with another part # crossed out, and 4003PP written in magic marker. This system does not contain remotes. It is an "add-on" system that connects to your existing keyless entry system New! Virtual TachTM eliminates the need for a tach wire in most installations New! D2D serial data port for Xpresskits