I finally found out how much the Porsche tax is today. A few weeks ago I took 4 18 inch Porsche wheels with no center cap to get the tire removed from the rim and it was $20. Today I went to the same mom & pop tire store with 4 17inch wheels to get the tires taken off but this time left the beat up center caps on them. I go to pick the wheels up and they told me it was going to be $30 this time
I quickly told the cashier (same one I had before) what I paid last time and she quickly changed it to $20.