The Polaris RZR XP 4 900 obviously can hold more people than the RZR XP 900! A great UTV for a family to go on a ride and enjoy the time together! For the RZR XP 4 900 we have many different UTV Accessories, this category has A-Arms. We have Super ATV brand A-Arms. We have two different options, High Clearance A-Arms, and Forward Off-Set A-Arms. Be sure to check out our different UTV Accessories we have for the Polaris RZR XP 4 900!