The original twin springs on each side were replaced by a single spring and damper, acting against the car's body instead of the rear subframe.
The body is a conventional, but light, unibody or monocoque construction, with (detachable) front and rear subframes.
Also the K2 chassis has a different rear subframe, fuel tank and side panels.
New rear suspension geometry (new rear subframe) was also introduced this year.
This wing was bolted through the rear quarter panels and into the rear subframe.
The reason for this was that the transmission, rear suspension and rear subframe were built as one unit.
These included connectors between the front and rear subframes.
The car was based on two front mini subframes, with the steering being locked on the rear subframe.
The front and rear subframes are attached to a central cell.
They replied that the car suffered from rust problems to its rear subframe.