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Unorthodox Racing Ultra Street Lightweight Underdrive Crank Pulleys

     Unorthodox Racing Ultra Street lightened underdrive pulleys can provide gains of 5 to 12 HP and 4 to 8 lbs.-ft. on normally aspirated engines and 8 to 16 HP and 8 to 18 lbs.-ft. on forced induction engines. These are average gains. Higher gains are possible.
     These gains are obtained in two ways. First, and most important, is the weight loss. An average of 2.7 HP is gained from every pound lost off the crank shaft. 85% of Unorthodox gains are from weight loss. The rest of the gains are from underdriving. Unorthodox does not push underdriving for two main reasons. First is to keep charging systems, air conditioning, power steering, and water pumps moving fast enough for every day driving. Second, not much horsepower is gained from extreme underdriving. Also, all of the underdriving is done with the crank pulley, not the accessory pulleys. This is done so maximum weight loss can be achieved at the crank where most of the horsepower gains are found.
     Unorthodox 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 representative of this. Every pulley is inspected multiple times from machining to anodizing to stocking and finally at shipping time. If at any point a pulley does not pass inspection it is pulled from production. Ultra Street lightened underdrive pulleys are available in black, polished, red, and blue anodizing. Please note that on some models red and blue anodizing are special order and may require additional time to ship.

Acura	Audi	Chevy	Chrysler / Dodge
DSM / Mitsubishi	Ford	Geo (No Longer Available)	Honda
Hyundai	Infiniti	Isuzu	Lexus
Lotus	Mazda	Mercury	Merkur
Nissan	Oldsmobile	Pontiac	Porsche
Subaru	Toyota	Volkswagen