I bought a set of 4k (even #) rpm shift pills for my msd 2-step. I only needed the 4.2 pill. If someone needs a 4k pill let me know I will let you have it for free since I no longer need the rest of the pills. I also have a 6,7,8k pill also. But I have all evens #'s for the -(4k) rpm set except 4.2 up for grabs. Save $25-30.00 - Mike