What is the result of evolution? Unorthodox Racing Ultra Street Sets build upon the success of Ultra Street crank pulleys by adding the Ultra Accessory pulleys.
Unorthodox accessory pulley are made of lightweight 6061-T6 billet aluminum, lighter than the factory piece it replaces, and includes lightening holes where possible.
Unorthodox splines and bores are precision machin...
Unorthodox Racing Ultra Street lightened underdrive pulleys 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 are held to within .001", and numerous machining steps are used to ensure the lightest possible design. In addition to fit, finish is just as important and each piece is repr...