Original pully for crankshaft suitable for 8 valve engines like G60 and G40. This pully should be replaced after loosing the bolt, otherwise the crankshaft can be damaged! Please also use new bolt with Loctite! Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com