Underdrive alternator pulley to suit FDCS RX-7 alternators. Designed to slow the speed of the alternator down to improve longevity & reduce amount of horsepower loss through the alternator. The pulleys are 75mm diameter, and available for the standard 5PK belt width & also 6PK belt width to suit our 6PK belt conversion kits. Suits shaft size 17mm. It is CNC machined from billet 6061 aluminium at our factory in Napier, New Zealand and is black anodised great looks and wear resistance.
