FD Mazda RX7 under drive pulley set

NZ made from 6061 T6 alloy, black anodized, and supplied with a quality Mitsuboshi 5PK belt.

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

A grooved water pump pulley eliminates 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.