Since the late 1980s, World Products has been casting their own small block heads. Known originally as the "Dart II," this successful design was employed by bracket racers and street heroes alike for a decade. Then, in 1994 World Products superseded the Dart II with the all new Sportsman II head, followed closely by the MOTOWN, and the ubiquitous S/R heads, rounding out the most complete range of 50 State Smog Legal heads currently available.