How Much Horsepower is a Horse?

In an experiment to measure the horsepower of a modified 2001 Honda Civic, known as "Big D", the team uses a load cell, GPS device, and homemade optical encoder to gather data. Despite technical issues with the laser, the team is able to calculate Big D's horsepower rating at 5.7 horsepower. The narrator thanks everyone involved in the experiment and encourages viewers to subscribe and like the video. In a surprising twist, the team reveals that they are making amends for spreading misinformation about horsepower in the past by creating a new t-shirt with the correct horsepower rating for Big D, which viewers can purchase at donatemedia.com.