Porsche rear emblem. I measured the letters on a Cayenne and they are about 41.3 mm wide and 22.3 mm tall. This model attempts to replicate the same size.

Adjust the size of the letters by scaling them uniformly in Bambu Studio, then uncheck the “uniform" check box before setting the Z-measurement to your desired height.

The letters have been arranged face down so that the texture of the build plate is on the front of the letters. I printed them on a Juupine smooth PET build plate to get the carbon fiber effect. (not aff: https://www.aliexpress.com/item/1005006332636167.html).

The print speed has been slowed down specifically for the smooth PET build plate. If you are using the Bambu textured plate, perhaps printing at full speed will be fine.