The B16B is Exclusive simply because it doesn't use the traditional B16 bottom finish. Alternatively, it uses a de-stroked B18 bottom finish which supplies it a distinct rod length and crankshaft throw. The B16B can also be the preferred, outputting 187 horsepower. It was only obtainable from the 1997 – https://hanks783boc7.thebindingwiki.com/user