With Unorthodox Racing Ultra S underdrive crank pulleys, additional power gains are seen from the underdriving of all of the accessories (which accounts for about 15 percent of additional gain). In most applications, all of their underdriving is done with the crank pulley, not with the accessory pulleys. This is done so that maximum weight loss can be achieved at the crank, where most of the horsepower gains are found. These crank pulleys are CNC-machined from lightweight 6061-T6 billet aluminum to ensure the material's strength and balance.
This is garage sale priced because it has been discontinued.
NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS