 Aftermarket tuners, such as Wald International and FiveAxis, have produced special IS F models, which have been part of the manufacturer's auto show exhibits.At the 2008 Tokyo Auto Salon, the IS F Racing Concept was shown.Few details were released at the show, other than that the concept was the work of chief engineer Yukihiko Yaguchi who built the concept "just for fun", to show "true driving pleasure", and exhibit a potential IS F race car.