Billet 16v crank pulley, serpentine drive-style, designed and machined by BBM. This crank pulley allows you to run a serpentine belt drive system on a 16v motor or for use with 16v G60 Limited, ABF 16v clone, or ABA 2.0L 16v/20v head conversion. Yields the correct belt offset on an 8v engine running the wider 16v timing belt with 16v head. Use the MkIII ABA 2.0L accessories bracket, water pump and alternator. Precision CNC machined, made in the USA by BBM.