These revisions include a new F-Sport package for the IS 250 and 220d, as well as the addition of a limited-slip differential to the high-performance IS-F.

Although the engine and transmission of the IS-F are unchanged, Lexus claims that adding the new differential makes the car two seconds a lap quicker around the Fuji International Speedway, where its test drivers put it through its paces.

The new differential works by sending power to the rear wheel with the most grip, and Lexus says it gives the car much more traction as well as improving its stability in high-speed corners.