Now Lexus IS still can be fast, but if customers want driver's sedan Lexus with V8 they may watch on old IS F of on more expensive new GS F. There is no variants for auto enthusiasts how to hear V8 sound inside really fast Lexus.
Lexus can present a new IS F which will be fast but without V8. Turbo V6 can give the same power or even more, but without V8 sound.