General Motors took the dowdy Buick Regal coupe and turned it into a legendary muscle car with the addition of a Garrett turbocharger and intercooler. In this episode of The House Of Muscle, Mike Musto shows us all a pair of the greatest turbo Buicks ever–a 1987 Grand National and the ultra-rare, legend-worthy GNX. These are among my top-ten 1980s American cars, and I’m glad that they’re featured here. Enjoy the video.