Mopar -- a portmanteau of MOtor ... four spots in the 1964 Daytona 500 -- prompted NASCAR officials to demand that Chrysler produce street engines to homologate the 426 Hemi for competition.

Mopar rides were the quickest accelerating ... This was a game-changer that gave normal folks access to cars with the engine ...

Changes in NASCAR regulations meant that Chrysler devoted ... with the elephant that symbolizes the size and power of the engine. Mopar is also planning to launch a series of celebratory events ...