32mm Pulley Pilot Diameter - If Pulley is needed, use Part Number KL47-15-131. On 1992-1997 Mazda Models MX-3 V6, 626 V6 and MX6 V6 Only, see note below : To receive the correct Water Pump, you must 1st determine if the Water Pump Pulley is 16mm I.D. or 32mm I.D. If Pulley is 16mm I.D., use Part Number 8AE2-15-010 Water Pump, this Water Pump is referred to as the " Early Style". If Pulley is 32mm I.D., use Part Number 8AK2-15-010 Water Pump, this Water Pump is referred to as the " Late Style". - On 1992-1997 Mazda Models MX-3 V6, 626 V6 and MX6 V6 Only, see note below : To receive the correct Water Pump, you must 1st determine if the Water Pump Pulley is 16mm I.D. or 32mm I.D. If Pulley is 16mm I.D., use Part Number 8AE2-15-010 Water Pump, this Water Pump is referred to as the " Early Style". If Pulley is 32mm I.D., use Part Number 8AK2-15-010 Water Pump, this Water Pump is referred to as the " Late Style". -