Connects to your Insight CTS2 Will control your tune levels for vehicles requiring a switch to control the power levels PERFECT FITMENT - This direct-fit Street Series system fits onto your vehicle easily thanks to the extensive use of 3D scanning during development to ensure OEM-like fitment. 16642 includes all the hardware necessary for do-it-yourself installation. LIMITED LIFETIME CONSTRUCTION WARRANTY - Performance that lasts. Enjoy worry-free ownership knowing that you're backed by MagnaFlow’s limited lifetime construction warranty