Unorthodox or Stillen Crank Pulley?

pty370z

Hey, thanks for your post. I actually didn't know of the existence of this brand. I am new to the Z family, never had a sports car before. Went to the links provided and people seem to be very happy with your products and the items seem to be very high quality. Congratulations!

I do have a question though, I noticed that your crank pulley is 10% underdrive and the alternator pulley is 10% overdrive. What happens with the stock belts for the crank and the alternator..?? Do I need to change the belts for new ones or would I keep my stock belts in both cases..??

Appreciate your comments.

__________________
2010 Solid Red 370Z * Touring-Sport-6MT * Black Interior
Performance: STILLEN * BERK * UR * MISHIMOTO * K&N * Z1 * ZSPEED * UPREV * DBA
Interior: GT-R Red Start/Stop Button * MSA Floor Mats * PW:JDM
Exterior: INGS+1 * SEIBON * FUJIMURA * PW:JDM * UAM * KICS * VOLK