While I was searching on a 2nd hand parts dealer for a gearbox for my D15B, I happen to see this D18B.Im sure it was not a D13B. I scratched the block hard to see what was really written. The cylinder head cover was exactly the same as the D15B (I think).The seller dont know from what car it came from.He just said the engine was imported from japan.I wonder if it could be possible to swap for my d15b?