have a mountune quick shit kit that I installed. It was only in the car for about 2 weeks before i bought the whole boomba kit. Product worked great but when i saw the boomba kit offered more reduction for the throws I just had to buy it. so, lightly used 2014 fiST mountune quick shift kit for sale- $200 obo. pm if interested.
I forgot where, but on one of the forums one of the first purchasers showed the old a new one side by side, it was mainly just an adjustment to the pin placement and the outer block shape shifted a bit i think. the allen bolt would be with both.