Boost your Polaris Pro R/Turbo R's suspension with our precision-engineered Upper Spindle Pin replacement. Crafted from robust 17-4 Stainless Steel, it guarantees durability and optimal performance. Maintaining the exact pivot point of the stock ball joint ensures consistent geometry and predictable handling. This spindle pin is compatible with other aftermarket arms using joints or uniballs. Install it effortlessly, secure with a 5/16" Grade 9 12pt bolt using red loctite (torqued to 25ft lbs), and maximize your off-road adventures with confidence.