The team went to work, adapting the existing RB block to accept a hemispherical combustion chamber cylinder head, leading to the creation of a new generation of the wildly successful 426 HEMI the ...

In 1964, the company started producing the 426 Hemi V8 engine ... that the intake and exhaust are on opposite sides of the combustion chamber. After the FirePower engine faded away in 1958 ...

Plymouth was left out of the first-generation hemi party in the fifties ... 1964 and 1974 but benefitted the hemispherical combustion chambers spoils only between 1970 and 1971.