Please note that the guidelines have been removed. That is because they are superseded by the newly updated Terms of Service.
The pertinent section -
The pertinent section -
So we see that all automotive modifications are not discussed here.The following topics are considered off-topic at all times and will results in Your thread being closed without question:
Phone jammers
Any kind of over-unity devices and systems
Transformer-less power supplies
Rail guns and high-energy projectile devices
Automotive modifications
Devices designed to electrocute or shock another person
LEDs to mains