Boss Bearing 41-3589B Ball Joint Kit

The Boss Bearing 41-3589B ball joint kit delivers precision-engineered, OEM-matching front suspension performance across a broad range of Can-Am and Polaris sport ATVs and utility machines — from the nimble DS 250 and hard-charging Outlaw 525 IRS to the versatile Sportsman 570 Trail, Scrambler 1000 XP 55, and the hard-working PRO XD Full Size Diesel and Ranger XP 1000 EPS. Built to meet or exceed factory specifications for a direct drop-in fit with no modifications required, this kit restores proper suspension geometry, eliminates the vague steering, uneven tire wear, and loose front end feel that worn ball joints cause, and brings back the sharp, confident handling these machines were designed to deliver.

This kit is available for both upper and lower positions — note that the lower fitment includes additional Polaris Ranger, PRO XD, Ranger 570 SP, Ranger 902 Diesel, and Sportsman Touring 570 models that are not covered in the upper application. Refer to the fitment table to confirm the correct position for your specific machine before ordering.