This guy never releases his mods though. There used to be a mod for a super ultra powerful drag T-Series with a giant drag supercharger sticking out of the hood. But it was made before the driveshaft on the T-Series was breakable, and now it breaks just from the sheer power. It could go like 5000 km/h lol
The Cummins diesel engines mod is pretty good, you can crank up all the boost and have very heavy duty internals and make a pretty quick trucc
If it needs to be only fast, you can use nodegrabber to rip off JATO units from Hero bus and strap then to semi: Controlling is somewhat difficult as after you hit T in a bus, you tab to t-series and then try to manage, but thing is really fastly out of control: That way you can make anything in game to be really fast, but perhaps not quite perfectly controllable, great for making wrangled mess of vehicles though:
You know that there is a mod that adds JATOs to vehicles so you don't have to attach them manually? And also lets you tune the JATO strength and all?
But that is too easy, much more fun to do it hard way and adding JATOs from 4 bus to piccolina just is fun challenge
