It had been the 1st 4B1 engine to generally be introduced, and it was mounted from the two.four L model from the Outlander along with the Delica D:five. The bore is 2mm wider than 4B10 and 4B11, rendering it a extended-stroke engine having a very long stroke. The 4B11 and 4B10 are based upon this engine, with lowered bore and stroke.one cale