ISI has just released new content for their rFactor 2 simulation.
The Howston HG4 and HG6 are based off the designs of the Lola T70, a successful racing car from the 1960s. In 1965 and 1966, the T70 was the fastest race car in the world, and at that point could outpace a Formula One car. It boasted stable, predictable, handling along with blinding acceleration.