BMW M12 Con Rod Bolt, Carrillo, CARR Type
CP-Carrillo offers two types of fasteners: H11 tools steel (WMC) and a Multiphase (CARR) Fastener. The difference is in the material and the longevity. The H11 tool steel bolts are good for about 15-18 torque cycles and the Multiphase fasteners are good for indefinite torquings when stretch method is followed for installation.
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