6PK-1554 - A/C - 6PK-1554 - Refer to Porsche Technical Bulletin. Book I, Page 129. (Belt must be re-routed) - Alternator & A/C - Alternator / Water Pump / Power Steering : 6PK x 1555 - Alternator / Water Pump : 6PK x 1555 - Power Steering : 6PK x 1555 - w/ Hydraulic Tensioner : Alternator / Water Pump : 6PK x 1555 - w/o A/C - Fan, Alternator & Power Steering -