Xray have released a new closed ball joint assembly for their T2 line of touring cars. Part of the assembly includes new threaded 4.9mm ball ends with a 6mm and 8mm thread for rear and front suspension respectively to replace the ball & screw assembly. These balls are great for use with closed composite ball joints but also work with standard open ball joints. Those new closed composite steering ball-joints fits 5mm pivot balls or ball studs. The closed ball joint prevents dust from getting onto the ball end, allowing the upper camber links to move more freely.