Yoshimura CRF450R/RX 17-18 RS-9T Stainless Slip-On Exhaust, W/ Stainless MufflersYoshimura CRF450R RX 17 18 RS 9T Stainless Slip On Exhaust, W Stainless Mufflers The 2017 CRF450R's new engine and muffler configuration gave us the opportunity to create an entirely new system built specifically for the new CRF450 machines. Introducing our all new Signature Series RS 9T tapered dual muffler exhaust system for the all new CRF450R. Yoshimura has been working tirelessly on development with American Honda HRC's engineers to achieve
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