ScottieDTV caught this 1971 Chevrolet Camaro backing out of Greening Auto Company’s shop, and the sound alone explains why the clip outlasted the full feature it was teasing. Under the hood sits a build pushing roughly 850 horsepower, numbers that turn a stock second-gen Camaro into something closer to a street-legal race car. The full story behind the build was only a week away when this was filmed. Turn your volume up and see what all the noise is about.