Dr. Jekill & Mr. Hyde Big Shot 4 Adjustable Slip-On Mufflers For Harley Dr. Jekill & Mr. Hyde 4 Big Shot Slip-On Mufflers elevate Harley-Davidson motorcycles by offering adjustable sound levels. Riders can easily switch between a gentle purr and an aggressive roar to match their preference or the environment, thanks to its innovative design. With over 25 years in producing adjustable exhaust systems, Dr. Jekill & Mr. Hyde have become a trusted name in motorcycle accessories, praised for enhancing performance and sound quality. Designed and crafted in Holland since 1997, these mufflers provide riders with exceptional acoustic control, setting new standards in motorcycle sound engineering. 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 High-quality stainless steel resists heat and corrosion Direct-fit design requires no modifications or tuning Compliant for emissions standards Available in Stunning Chrome or Bold Black Comes with a 4 year, unlimited mile warranty