Manufactured by Factory Spec 1 Pair of 1 spacers adds 2 total width, makes it easy to widen the stance of your ATV. Provides extra stability and has the ability to accommodate larger tires. Studs are integrated, you do not need to remove the stock studs for installation. Hardware included for easy installation Constructed of 6061 T-6 aluminum for maximum strength and durability These spacers will work with a bolt pattern of 4/110 The FRONT AND REAR of the following models have a bolt pattern of 4/110 2007 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2008 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2009 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2010 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2011 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2012 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2013 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2014 Yamaha Grizzly 450 4x4 YFM450D