(13B-MSP- Eccentric, Alternator and Water Pump) Built for the (04-08) Mazda RX8... Ralco RZ Underdrive Pulleys are designed with a unique blend of performance and reliability. These pulleys are made from the highest quality 6061 Aluminum billet. Ralco RZ pulley conversions are proven to produce maximum power gains with the performance benefits of weight reduction, that you wouldn't receive from factory parts.
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