My own design for Losi 8ight 3.0 buggy mudguards. The car is a nitro converted to electric, but that should not matter.
These ones protects the shock better.
I printed mine 1mm thick, but you could try thicker or thinner if you like.
Distance between the holes is 59mm
Infill should not matter if you print at 0.2mm layer and make the mudguards 1mm thick.