FD Mazda RX7 Under Drive Pulley Set

Green Brothers FD Mazda Rx7 Underdrive Pulley Set

• CNC Manufactured in-house from 6061 T6 alloy
• Black anodized (35 micron semi-hard for maximum life) 
• Mitsuboshi 5PK belt 

Benefits include air pump delete, reduced coolant temps and a few extra HP. Suitable for both street and competition applications 

The grooved water pump pulley relieves trapped air to help eliminate belt slippage 

Water pump overdrive is reduced from 1.3:1 to 1.05:1

Alternator overdrive is reduced from 2.2:1 to 1.7:1

Does not adversely affect alternator output at idle speed