Known for its power, the Hemi engine has spent over 70 years on the market. Many of the world’s best cars and trucks use this engine, thanks to its unique design. Today, we’re going to take a look at what makes this engine so different from others out there and the history and development of the engine over the years. We’ll also discuss best practices for replacing cylinder heads in a Hemi – and when and why you might need to do this.