I have a TZ in my HPI MT 1 ¾ but not only did I have to put all the SS up grades but more. The TZ is way too much engine and I recommend something like the OS 18 CV-RX, which is more then enough for the MT. Even with the CV-RX you should up grade the drive train. If his MT2 came with the T 15 it had to be the RTR version.