The Bowtie Nationals® Gandrud Chevrolet Dyno Challenge is free to all registered vehicles. It’s a great opportunity for you to see what your engine horsepower & torque numbers are. Everything from a stock 6-cyl to a wild turbo V8, we have you covered. There are also trophies for the top two spots. It’s fun & it’s free! Pull up, spin up, and see what your numbers are!