Couple of things that might help you, though. Firstly, it's not the mods that do this stuff, although the naming can get a bit confusing. What you needed was an xml edit, and a lot of people here refer to those as "mods". Personally I don't like calling them mods, because that gets confused with actual mods (short for modifications), which add more content to the game. Just to make it even more confusing, "the mods" are the moderators, a small group of us that makes sure the rules of the site are being followed.

While I'm here, design tips: I assume this is for the land speed record mission. Inlets don't actually work if something is blocking them. Check the drag view when building; if the intake isn't bright red, it isn't getting any air. Reducing drag is pretty important for this mission anyway. If you make something slippery enough, you can complete the challenge with very little power indeed.

Here you go