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
Part # YA9924
Standard slip on system with CARBON mufflers.
This slip on comes with dual carbon fiber under tail canister. Retains stock catalytic converter. Produces 3.6 horsepower over stock.