Do you like to do backflips? Of course you do! And now you can! Well soon you can... http://www.beamng.com/threads/backflip-ramp.28931/
That model seems to be from Assetto Corsa. You're probably gonna have some copyright problems with that. There was a mod that had a mesh from AC but it was removed because AC devs asked it to be removed. But if it really is made by you or something, then I'm sorry for my mistake.
Finally get rid of place holders (Original place holder is Grand Marshal engine) Thanks to @wrinkle345 for his tutorial (Engine porting tutorial. Used it as a base)
Update for suburban: Added a lot of stuff, like universal wheels and the whole body can catch on fire (thanks to Pissh) New camera, more j beam work and a new engine (thanks to Vinh) And, I improved on nodes and made weight a bit more realistic also I did file work. WIP: Dynamic Reflections, Front Diff, more j beam, solving bugs, more configs and other stuff.