The hemispherical cylinder head design allowed for bigger intake and exhaust valves, meaning more fuel ... engines - specifically to challenge the extremely powerful but aging Chrysler 426 Hemi ...

The hemi head design allows larger valves that increase the engine's internal air-fuel mixture and exhaust ... However, around the same time that the 426 HEMI was making its mark on the muscle ...

Dodge Charger R/T has it all: a rare Hemi, survivor status, and high originality. But is it worth a quarter-million bucks?