In 1958 a traditional 2 seater version - the BN6, of which 4,150 were built - arrived and used the six-port head that had been introduced in 1957. 100-6 cars can be distinguished from the early four cylinder cars by their chrome finished bonnet air intake and smaller grille.

In 1959 the improved 3000 model arrived and production of the 100-6 in all variants ceased.