The OEM steel water pump pulley is stamped which creates internal stresses that eventually cause the pulley to crack at the sharp bend radius. Needless to say, you don’t need this problem on a hot running VR. Ours is machined from a solid block of aluminum with generous corner radii and is therefore many times stronger than OEM. Weighing in at a scant 250 grams, its less than half the weight of the stamped OEM steel pulley. Fits all of the 24V VR6 engines.