Mazda 12A/13B Twin V-Belt Alternator Pulley

This is a replacement alternator pulley to suit early 12A and 13B rotaries through to series 5 RX-7 (vehicles with 15mm alternator shaft). It allows a second v-belt to be added for improved reliability, particularly on high-revving engines. Two alternator belts of the same size as original are required. Note - does not change the drive ratio of the alternator

Benefits:

• Eliminates belt slip on the alternator/water pump/cooling fan pulley's 
• Shares the load between two belts 
• Back up belt if one belt fails 

Available in Red, Blue & Silver