The motor I believe was built locally close to Buck and Jess live to TTS specs using mostly TTS parts. Transmission is or was a Duriflite by Suncoast. Compound turbos by MPI, I knew what they were, but they may have upgraded and that is Nathan's domain to talk about. Tuning is by Steve Cole at TTS. I know they were going to hook up NOS but whether they have or not I don't know. Anything else Buck, Jess or Steve Cole would have to tell you.