These are lift blocks for the Classified VAMP or Stinger. I recommed using the 5MM size to give the stock vehicle a much better stance. The 10mm block will look good with the stock tires, but they are essencial if you plan to print and use my 93MM wheels and tires. I have printed these many times on my Jupiter with no issues. Depending on the calibrations on your machine, a slight sanding of the matine surfaces may be needed. Also, to install these, you will need the correct screw lengths. If you have any issues, please let me know.