VG8PG-1: Nozzle Ring Casting vanes (Same as VG8-1, with grooves on the push rod) VG8PG-1-CNR: Nozzle Ring Casting vanes Push rod carbonnitriding (Same as VG8-1-CNR, with grooves on the push rod) VG8PG-1M: Nozzle ring Machined vanes (Same
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