I have a 1:1 scale IROC Z with a exhaust damper. When opened, it sounds like the engine sound used in two lane blacktop when accelerating through 2nd gear. It even has that booming low hitting bass sound like the movie, especially flying through the Sumner tunnel, and watching the ceiling...
OK, so have 2 more HPE (Heisenburg Performance Enhanced) Rustlers to build, then the "Slagster". The slag has all aluminum stuff, except like control arms, aluminum trans case, side winder castle 4600KV, Hoosier drag slicks, just looks like so much fun to build, and it's all in my work shop...