I have a white 92 gsr b17 vtech- japan, I hope you know how rare of a car you have! you can't find too many b17 around. It's a special edition. Hold on to it! . . . .your vin # on the engine should match the cars vin#, if it don't who ever you got it from swapped it on you. but it sound like it's official to me. take a pic of the motor & post it. usually you can tell just by looking at it and driving it.