American Star?Polaris Replacement Upper Ball Joints (2) Set of 2 Top Or BottomOK SO READ THIS VERY CAREFULLY!??You are looking at American Stars 4130 Chromoly Upper and Lower Replacement Ball Joint Set. Are all ball joints the same? NO!All Americans Star Ball Joints are Manufactured out of 4130 Chromoly Aircraft Grade steel which is 3 to 4 times stronger than our competitors Ball Joint. Everybody else manufacturers their Ball Joints out of Mild Steel including OEM Polaris. If you bend, break or otherwise damage an Ball Joint within 90 days of purchase we will replace 100% free of charge. Yes our Ball Joints are a few more dollars than our competitors inferior products, but what value do you put on your safety!Our products are proven to be the best in the industry. And our Customer service is even better! We guarantee if you have a problem we will be there to help you! Over 20 years in business and we were the very first company to ever list ATV products on eBay. Give us a try, We guarantee you will not be disappointed.?Replaces Polaris Part # 7081924, 7081505, 7081580, 7081666, 7061187, 7061220, 7081859, 7081991, 7081263, 77105332013 Gem All Options?2013 MRZR 42013 Ranger 900 XP All Options2012 RZR 4 XP 9002013 RZR 4 XP 900 PS INTL2013 RZR 4 XP JAGGED X?2013 RZR XP 4 900 EFI?2013 RZR XP 900 EFI2012 RZR XP INTL2013 RZR XP 900 EPS INTL2012 RZR XP 900 EPS INTL