Toyota Racing Development of Japan released this update on their progress with their Griffon concept based off of the GT-86. Originally debuted at the 2013 Tokyo Auto Salon, the idea was to build a car capable of lapping Tsukuba Circuit in under a minute with the stock unibody and engine. All of the modifications have been done in the areas of suspension, lighter components and improved aerodynamics. These modifications make sense when you consider the Toyota GT-86 is the spiritual successor of the AE86. Both cars were designed to be lightweight handling machines with modest power so they could be used to train drivers.
Source: TRD Headquarters on YouTube