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Unorthodox Racing Ultra Accessory pulleys (4 pieces) are included in the Ultra Street Sets or may be purchased separately. They are CNC-machined from lightweight 6061-T6 aluminum billet. Premium 6061-T6 aluminum billet ensures the consistency of the material's strength and balance. Tolerances for each accessory pulley is held to within .001". In addition, numerous machining steps are taken to ensure the pulleys are the lightest possible design. Premium fit and finish ensures a beautifully matched set you are proud to display under the hood of your vehicle. Power gains through the use of Ultra Accessory pulleys are obtained through weight loss (15% to 30%). The Ultra Accessory pulleys are the same diameter as the stock units, so you may install an Ultra Street lightened underdrive crank pulley as a first step. Then, at a later date, you may purchase the Ultra Accessories and install them without having to change belts again. Shipping is $20
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