Modern V8 from the Grand Marshal with a procharger that soon got a twin. Made it myself. Just edited the engine to fit inside Barstow's engine bay in Blender and mirrored the charger and moved all pipes and wires so they don't clip through any meshes. Didn't take long to make but I lost it when I had to reinstall the whole game after 0.5.1 update.
I'm making the "1996 Gavril D-35" as seen at the random screens posted by @HadACoolName , http://www.beamng.com/threads/random-screens.10260/page-4#post-295926 I said"hey, that looks sweet", so I've been modeling since 3:00 pm pacific time, so I got about 3 hours into it now