Honda SSM
Introduced at the 1995 Tokyo Motor Show, the Honda Sport Study Model concept car was the design study for the production S2000. The SSM was a rear-wheel-drive roadster powered by a 2.0 L (122 cu in) inline 4-cylinder engine. It featured a rigid X-bone frame which Honda claimed improved the vehicle's rigidity and collision safety. The hood was aluminium and the car had a 50:50 weight distribution.
The SSM would appear unchanged in many automotive shows for several years afterwards, hinting at the possibility of a production version, which Honda announced in due course in 1999.
Read more about this topic: Honda S2000