aFe Scorcher HD modules include a high-quality case and wire harness with factory-style connectors for an easy plug-and-play installation. An LED light switch provides in-cabin, on-the-fly power adjustments. The four power settings are adjustable with one button and the LED light represent the settings: stock (green), sport (yellow), sport+ (orange) and race (red). The aFe Scorcher HD modules add significant power by altering pressure sensor signals to increase turbo boost and fuel pressure to improve vehicle efficiency, power, and throttle response. They use a high-quality aluminum extrusion black powdercoated enclosure casing and factory-style connectors which requires no modification to your factory harness. These factory-style connectors plug directly into the stock wiring harness connectors and sensors.