The car becomes less stable at higher speeds due to the 20" rims' larger sidewall profile and the accompanying AT tires' lower speed rating, so I wouldn't be surprised if that's the limit. The vehicle's suspension should be set up according to the rolling stock it is designed to carry, as far as I'm ...

Could you please tell me the pricing of untarnished silver?
Can you tell me where you are?

The owner's handbook was not sent to you? Are the wheels still on the vehicle? This can be due to a flat tire or an unevenly shaped wheel.

Bosch part number, not injector code, that's what it is.