A 2008 Shelby GT500 running a smaller supercharger pulley, a custom tune, and drag radials for roughly 650 horsepower takes on a completely stock 2013 Cadillac CTS-V Coupe and its factory 556 horsepower LSA V8 in a heads-up quarter mile. The Cadillac’s showing against a 100 horsepower deficit drew real respect in the comments, and the channel even responded to a viewer’s question about the included density altitude data. Watch the run to see just how close a modified car and a stock one can actually be.