Hardrace Front Upper Arm 2 Chainlift Hilled Wooden Coaster Theme Park Tycoon 2 YouTube. HARDRACE is proud to announce the Pick up truck series arms. These control arms made with HARDENED steel and compound with superior HARDENED rubber bushings, unlike polyurethane bushings as easy broken. High strength and anti crack material extends the lifetime and provide solid steering response. A good control arm can regulate the movement of wheels quickly each time you turn or corner. . Pick up truck series arm . Increase caster for better ride quality . Grease nuts design for regrease it inside the upper black boot . Super strong and durable . High strength steel tubes with 4mm tube wall thickness . CR MO Ball Joint and special boot design, self anti dust function . Equipped with superior HARDENED rubber bushings . Dramatically improving handling performance