Don't all modern cars use a hemispherical combustion chamber in their engines? If so, why is “HEMI” still being advertised as if it were different? - Quora
What is the difference between a HEMI combustion chamber and an I-head combustion chamber? - Quora
Hemi Engine Pros and Cons
Why Is a Hemi Engine So Special? - eBay Motors Blog
Looking rather different to a modern stock piston. New machined from billet with a hemispherical combustion chamber … | Combustion chamber, Monza, Original designs