What tire pressure do you run? I just switched tires from the stock Pirelli to Michelin PR4's and started having speed wobbles under hard acceleration only. Called the dealer and they told me to set the rear tire to 31psi and the front to 33 psi. It did help with the speed wobbles but the stock tires I had were set to the manual recommended settings of 36 psi rear and 33 front and never had an issue. Any opinions on why there was no issue with the old tires at the higher pressures?