These spacers allow you to mount shocks from popular ATV's onto your Polaris 50" RZR, as an inexpensive alternative to the high priced aftermarket shocks. Suzuki LTR 450 or Honda TRX450 shocks can be used in the front of your RZR, and YZ shocks can be used in the rear. These shocks can be purchased very inexpensively, and provide a HUGE performance increase over the factory Sachs shocks.
Mounting info can be seen here:
http://www.rzrforums.net/suspension/51218-part-2-ltr450-yz125-shocks-std-rzr.html