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The S&S CYCLE 4-1/2 inch MK45 Performance Mufflers (Part #550-0670) are engineered for riders seeking enhanced sound and performance. Designed with decades of experience in racing and tuning, these mufflers feature a stainless steel baffle and RaceTEX cartridge packing, ensuring durability and optimal sound quality. They produce a deep, aggressive rumble that enhances the motorcycle’s auditory presence while helping to improve horsepower and torque for a more responsive ride. The stylish aluminum endcaps add a distinctive look, making these mufflers not only functional but also visually appealing. The removable dB reducer allows riders to customize sound levels according to preferences or local noise regulations. Proudly made in the U.S.A., the MK45 mufflers are suitable for a variety of applications, excluding trike configurations, providing a perfect combination of performance, style, and quality for sport and cruiser bikes alike.
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