The 350z crank pulley is a valid part for performance on the Z. With a performance crank pulley you gain additional horse power and torque on your vehicle. After market pulley made up of lightweight Premium made billet aluminum to ensure consistency of the materials strength and balance. Every crank pulley is inspected multiple times from machining to anodizing to stocking and finally at shipping time. If at any point a crank pulley does not pass inspection it is pulled from production. An average 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. Higher gains are possible. For example, a Nissan 300ZX twin-turbo saw gains as high as 37 HP and 45 lbs.-ft. on the dyno just buy replacing the stock crank pulley with the Ultra S lighted under drive crank pulley. Power 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 our gains are from weight loss. Many have asked for performance crank pulleys that do not under drive their alternators, pumps, or super chargers. This after market Crank Pulley stock diameter polished crank pulley gives you the performance benefits of weight reduction without a reduction in spin. These all run at stock speeds, with no under drive. Even more critical with the addition of a supercharger, now you can have the same boost level with the use of the factory diameter crank pulley. One hundred percent of the power gains from the stock diameter pulleys comes only from weight reduction versus the factory crank pulley. The reduced weight allows for more power transfer to the drive wheels. These are average gains. Power gains are obtained in two ways. First is the weight loss. An average of 2.7 HP is gained from every pound lost off the crank shaft. 85% of UR gains are from weight loss. The rest of the gains are from underdriving, which accounts for about 15% of the total gains. All of 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. Ultra Street lightened under drive crank pulleys provide excellent power gains for little investment.

• Real HP & torque gains across entire RPM range, tests showing up to 13hp
• Performance crank pulley one of the highest HP/Torque per dollar gains on the market
• Performance crank pulley better than OEM belt fitment & alignment

If you like to learn more and improve the performance on the Nissan 350z with Crank Pulley please visit us at 350zEvolution.com.