ZPI or NST crank pully?

[CASTREX]

Originally Posted by ChinoCharles

I was wondering when this question would pop up.
I've spent countless hours over the past month or two talking to Mike about his products, his company, and the tuner scene in general, and I've learned a ton.

Chino would you share a bit of that TON of knowledge...?

I don't know if this has been answered here before... but do you happen to know why NSt didn't underdrive their yaris pulley? Their Scion pulleys are underdrived. Just wanted to know if there's a reason for this.