he current generation Kawasaki KX450 has won over a lot of riders with its balanced chassis and predictable power delivery. We felt there’s still more on the table for improvement, enter our new RS-12. With countless hours of track and dyno testing, the KX450 responded well to our RS-12 with crisp and clean usable power that is up across the entire rpm spectrum. The result, max HP was up 9.6% and torque was up as well at 5.6%. Yoshimura RS-12 will improve your experience on the green machine and decrease dB level from stock noise levels. Just what the doctor ordered. Proudly designed, developed and made in the USA! Rubber mounted RS-12 muffler dampens vibration to subframe Aggressive intelligently designed, the RS-12 asymmetrical shaped muffler allows maximize capacity and incorporates a resonance chamber for managing sound and increasing usable power. RS-12's unique profile also provides more clearance for tire and brake caliper. Improved performance gains with refined power delivery. Just like the works systems our Factory Racers use, RS-12 systems utilize precision machined joints. Machined joints provide a superior and exacting fit for joints by better securing the seal between two surfaces with a perfect 360 degree contact surface which translates into improved system life, fit and performance. New patent pending Precision Taper Fit (PTF) insert ring makes it easy to install and remove sound inserts and spark arresters. Works-look matte carbon fiber end cap with industry leading design, innovation and detailing as expected from Yoshimura. Carbon end cap covers the RS-12 inner cap, thus improving looks, while providing easier service as compared to other sandwich mounting designs most commonly found in the industry. Repack Kits, optional Inserts and Spark Arresters are available for all models . . . . . This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not found on a bike as delivered from the factory may not be compatible with this product. Attention international customers: This product was designed and tested to be compatible with vehicles in the U.S. marketplace only. Compatibility, including fitment and performance, may vary by marketplace.
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