Unorthodox Ultra R

Unorthodox Racing Ultra R underdrive race crank pulley is Single-belt crank pulley conversions go even further to provide you with the highest possible power gains. They are also a must in many of the Acura/Honda engine swaps where the stock pulley will not fit because of clearance issues. The single belt design only drives the alternator . This makes for an extremely light piece that will provide you with excellent power gains. Single-belt crank pulleys are also perfectly streetable and can be used in many Acura/Honda applications where the A/C and P/S are being removed for street or track use. Our single-belt conversion crank pulleys are only available in polished aluminum finish.

• Real HP & torque gains across entire RPM range
• One of the highest HP/Torque per dollar gains on the market
• The broadest range of applications available
• Over 8 years of use in "real world" applications from street to strip to rally to road course
• Better than OEM belt fitment & alignment
• Alternator pulleys available seperately for most applications
• CAD designed & CNC'd from 6061 Aluminum billet