The tires just got balanced
Alignment less than 5k miles ago

I can't figure out what is causing the nasty steering wheel vibration above about 50 mph- and it is speed sensitive (faster=worse)
Koni yellows look fine-no leakage
All seals on the two arms from the front wheels are intact

Any ideas?
steering rack?

Any help would be appreciated

 

Hmmm...Maybe your wheels got out of balance somehow...?

Or, if you have aftermarket wheels, maybe one/some of your hub rings are cracked?

Just a couple guesses.

 

I test drove an 08 and found some vibrations at 125km/hour.

I did a search in this forum and found this. It could help

https://acurazine.com/forums/showthr...ibration+wheel

D