So I've spent a week trying to repeat this with some sort of consistency on various freeway and street curves. I'm going to rule out the fuel pump, as I'm not seeing any drop in revs and the hesitancy isn't as abrupt as I would expect if there was a loss of fuel to the engine. There seems to be a correlation with a change in the roadway (expansion joint, tarmac wear) that suggests to me that the issue is tire related. Perhaps the run flats in the front have some sort of play in them that's not transmitting through the steering wheel? Or they are tramming...
The alignment appears on-track if I drive and let go of the steering wheel - wondering if this may be a bushing issue...
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