For a few years Lexus fitted Dunlop SP9000 tyres to the IS200 in the UK. These tyres were specially designed for the IS200 and differ from the standard SP9000 tyres available in the UK. They normally cost about £10 more over the standard version.
The following information has been provided by Dunlop Tyres/Goodyear on the differences and how to tell the OEM and standard tyres apart:
"The biggest differences in the 215 40 r 17 Dunlop SP9000 for the Lexus are internal. The tyres construction is tuned to compliment the way the car handles.
The Lexus tyre is made in Japan while the standard SP9000 is made in Germany. Both tyres have stickers on the tread when new. They are removed when fitted. The sticker will say if the tyre is for the Lexus should it be the correct one. Should the sticker have been dislodged then look for made in Japan on the tyre."