hey guys, need help on ordering the auxilary idler pulley, I have a 6lb lower, two JDM 100mm idler pulleys and KB 3.5" upper pulley,...just wondering if I need to get the 90mm or 100mm kit, I'm assuming that I want the 100mm, but just wanted to make sure before I ordered it

 

It doesn't matter which one you order. The 100s will give you a little more belt wrap.