>>38636 oof, that looks ..erm.. his mommy loves him. :P
Vanilla you can set single and dual turbo, single and twin scroll where the latter gives the most power. I bet there are mods but I haven't tested any yet.
Also right now, my 4L V8 with 400 hp is already tricky to handle in AWD, so more hp & torque will probably shatter the chassis, lol.
It does allow mods but the content is already massive. You can build a inline, boxer, 60 dg V, 90dg V shaped engine, NA or turbo, carb or injected (multi or single or direct), type of gearbox and the amount of gears, gear ratios, type of material, sizes of in- and outtake, etc
And then you can mold your whatever-you-selected-car shape (sedan, coupe, van, pickup, etc) and chose fixtures (inc. size and shape), wheels, suspension etc etc. You can do interiors but it isn't working ingame but it does show it.
Here my idea of a proper 50's British sports car with a 6-cyl inline :D