lol. the owner before me told me that it had a R34 GTR turbo but he wasnt sure. and he said it was rebuilt but I wasnt so sure about that. then the guy i traded came over to help me with a few things and he called the previous owner before him that did all of the work and verified everything. and the good thing about it all is that martin built the SR, built the turbo, and tuned the motor too. so yea.