no way.. That will never happen... a 4.0liter/4.3 liter in an IS? That will seriously hurt the GS... It's an unnecessary move. Offering a supercharged version of the IS is the logical choice.
Eric...
Possible but very unlikely. Lexus has never been ambiguous with their model lineup. If anything, I think a high performance version will come from TRD/L-tuned but not directly from Lexus as a model package.
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