A prototype Lexus GS F has been spotted by Best Car magazine in Japan — along with the image above, there was also a closeup of the rear:
Look closely at the taped up badge on the right, and the F logo is clearly outlined — other additions include the larger trunk wing, quad-exhausts, and a revised rear spoiler.
One other spy photo captured the front fender vents:
All together, this heavily modified GS could reflect the final appearance of the high-performance GS F — based on these spy photos, Best Car created this rendering:
The only other detail visible to a non-Japanese speaker is the engine specs — according to the article, the GS F would be using a 5.0L V8 with 465 hp, 10 hp more than what’s been rumored for the RC F coupe.
Here’s the full page from Best Car: