Unorthodox Racing Ultra R Series Underdrive Crank Pulleys

Single-belt crank pulley conversions go even further to provide you with the highest possible power gains. They are also a requirement in many of the Acura/Honda engine swaps where the stock pulley will not fit because of clearance issues.

• The single-belt crank pulley design only drives the alternator (includes any accessories also driven on the same belt).
• Extremely light piece that will provide excellent power gains.
• Perfectly streetable, and can be used in applications where the A/C and P/S are being removed for street or track use.