If you stop and think about it, one engine has made motorsports in the United States for nearly 50 years. The Offy was a great engine, as was the four-cam Ford. Who can forget the mighty Mopar hemis?

Originally developed for industrial use, the 6-71 blower has become a hot-rodding icon. We delve into the details and test one on a 406-inch Chevy small-block.