Dr. Jekill & Mr. Hyde LUX Streetfighter Adjustable Slip-On Muffler For Harley The Nightster, preserving the iconic characteristics of the Sportster lineage, introduces leading-edge technology to carve its own path in the motorcycle world. It features the remarkable Dr. Jekill & Mr. Hyde 2in1 exhaust, equipped with the LUX Streetfighter Adjustable Slip-On Muffler. This system stands out with its electronically controlled valve, allowing riders to modify sound levels dynamically, from a stealthy whisper to a commanding roar. Dr. Jekill & Mr. Hyde, with over a quarter of a century in the industry, is at the forefront of adaptable exhaust technology, offering high-performance systems with unmatched sound quality and versatility. Crafted in Holland since 1997, these mufflers are for those who want to dictate their sound signature. This innovation in sound control transforms every journey. Features: Easily switch between all 3 modes Dr. Jekill Mode - A calm, low-key but distinctive sound Dynamic Mode - A tamed Mr. Hyde sound Mr. Hyde Mode - The exhaust boosts a beautiful, deep rumble Electronically Controlled: Operated by an advanced electronic switch seamlessly integrated into your bike Precision-engineered for adjustment and reliability Enhances exhaust flow, backpressure, throttle response, and torque Direct-fit design requires no modifications or tuning Compliant for emissions standards Comes with a 4 year, unlimited mile warranty