I havent had a chance to get on a dyno with my crazy work schedual but i think its more of freeing up power because of the lighter rotational mass. I do however notice that when driving hard the RPMs climb alot faster than with the stock pulleys.
I just looked at unorthodox and noticed that they only offer stock diameter pulley replacements NST has the underdrive crank overdrive alternator =) easy instal on crank but alternator was a pain just cause u have to take it off everything id so tight in that engine bay
I dont know that it is better by chance but i liked that you could get them in red or grey like i did. They also have the overdrive pulley for the alternator and there price was much better than stillens or unorthadox at if i member correct $230 shipped. I think NST is very reputable an have 1000 miles on the pulleys with no problems as of yet.
actually i used real automotive paint..... u shot it out through a spray gun.... i think spray paint would come off cuz its always moving and always being touched...