This is a lightweight crank pulley for the BMW M50 & M52 engines typically found in the following models:

96-01

• 323
• 325
• 328
• 330
• M3 (Ex Lightweight)
• 525
• 535

97-99

• Z3 2.3

This pulley weighs 675g and is a smaller diameter than the original, so will require shorter belts.