... by temperature difference thus ensure the internal C.V. Joint tracks are precise.The six equal division points are ... double circle arc ball track, the C.V. joint runs smoothly without noise or locking.Heat treatment equipments are ... made in Germany.Various ModelsCV joint suitable for1.Audi Series: A3,S3,A4,S4,RS4 ... ,Passat,Rabbit,New Beetle,Bora,Santana, Caddy Outer CV Joint