Upgrade your Yamaha with the MBRP AT-6412SP Sport Slip-On Muffler, designed to enhance your ride's performance while delivering a mild exhaust note. This premium muffler increases exhaust flow and power, making it an essential addition for any enthusiast looking to optimize their vehicle's capabilities. With a sleek 4.25" diameter, it provides a perfect balance of sound and efficiency. The MBRP Sport mufflers are crafted from lightweight 304 stainless steel and feature a durable ceramic coating for added longevity. Unlike other systems, there is no need for clutching adjustments, allowing for easy installation and immediate performance improvements. Engineered to comply with noise regulations, the Power Tech 4 slip-on systems meet 96 DB at 4000 RPM, ensuring you can enjoy a powerful sound without compromising on legality or comfort. Features: * Mild exhaust note for enhanced performance without excessive noise * No clutching adjustments required for easy installation * Engineered to meet 96 DB at 4000 RPM for legal compliance * Constructed of lightweight 304 stainless steel with a ceramic coating