Off-road Sintered Premier PR pads have been upgraded to a high-density sintered metal compound suitable for all types of MX and ATV use Not for highway use. Reminder: one set of brake pads services one brake disc if you are servicing multiple discs you will need multiple sets of brake pads. Fits: Arctic Cat 1000 H1 Mudpro 2009-2011 300 2x4 2010-2011 366 (auto 4x4) 2007-2011 550 2011 550 H1 efi 2009-2010 Polaris HAWKEYE 300 2x4 2006