Olds also used domed pistons for the engine, along with centrally mounted spark plugs, just like a traditional hemi. The 455-cubic inch W-43 was reportedly capable of an impressive 440 horsepower.

While the tongue-in-cheek commercial was used to point out that not only did Dodge Chargers have HEMI engines, but that Dodge trucks could also have them, the commercial didn't tell consumers a ...