It absolutely was the very first 4B1 engine to generally be unveiled, and it had been put in in the two.four L product on the Outlander and the Delica D:5. The bore is 2mm wider than 4B10 and 4B11, making it a extended-stroke engine with a prolonged stroke. The 4B11 and 4B10 are depending on this engine, with lowered bore and stroke.At first