How to put this save into your game:
1-Open AppData\LocalLow\Amistech\My Summer Car
2-Backup your save files.
3-Copy and paste the 10K MK Challenge save in your save file.
4-Select overwrite all.
5-Open My Summer Car and enjoy your challenge!

Rules:
To win you have to race around the highway a lap with the lowest time.
5 days to build car and race.
10K MK budgett only (no cheats or work to win money).
No use of mods except to skip Parts order or Mechanic (-1 day per skip).
You are forced to install Roll Cage and Fire extinguisher.
Cant take body pannels off (except bumpers, front grille and interior pieces)

Other:
Food, drinks and fluids pre-bought.
No need for bucket seats.
Car doesn't need registration.
AFR Gaugue and Marker Lights also pre-bought.

Credits:
AMISTECH-My Summer Car creators.
Sparkz 25-OG creator of the 10MK Challenge (https://www.youtube.com/watch?v=0ZLhkc21ZqA)
Mods & tools creators (like MSCeditor creator)