Overview of Yoshimura Stainless/Stainless/Carbon Fiber Race Series RS-4 Exhaust System - 123500D521
|The work that went into developing the RS-4 muffler design paid big dividends in 2010 with Ryan Dungey winning the AMA 450 Supercross and Motocross Championship series as a rookie in the same year, and again in 2012 with the Yoshimura-backed GEICO Honda team winning both 250 Supercross Lites titles. That same R&D has been directed to developing the current generation RS-4 Â- a unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 features a Polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap.
(1) Header w/flange
(1) Muffler w/tailpipe assembly
(1) Rubber wash plug
(1) Spring puller tool
(1) Exhaust spring
(2) 6mm-1.00 x 8mm Button head screws
The Air Resources Board (ARB) does not permit the use of aftermarket emission-related parts that alter the air/fuel ratio of an emission-controlled vehicle. Due to these legal restrictions this part cannot be shipped to California.
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