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M4 YA9924 SLIP ON SO EXHAUST SYSTEM
DUAL CARBON FIBER CF MUFFLERS W CF END CAP
YAMAHA YZF-R1 YZFR1 YZF R1 R1000 1000
09 10 11 12 13 2009 2010 2011 2012 2013 14 2014
tain the Catalytic converter
This slip on comes with dual carbon fiber under tail canister. Retains stock catalytic converter. Produces 3.6 horsepower over stock.