yes, German rubbers for a German whip! The GS-D3's have actually saved my S4, if not my life, a few weeks back...had to avoid an oncoming car crossing in front of me and had to swerve a quick right, tap on the brakes, induce a little understeer, then accelerate, and avoid a telephone pole doing about 60, full boost...these bad boys stuck like glue! The only thing I'd add to your very insightful review is noise level...can't beat the Goodyears either! The bottom line is...you get what you pay for!