GTO
John Z. DeLorean's greatest creation (next to the DeLorean).  Built beginning in 1964 as an option package for the Pontiac Tempest LeMans, it was immediately successful.  GTO stands for Gran Turismo Omologato, or in English, Grand Touring Homologated.  It envolved taking a relatively small Tempest body, removing the 4-cylinder engine, and dropping in a much larger 389 cu. in. V-8 found in the Pontiac Bonneville.  The result was an absolute thrill to drive.  To date it is regarded by any true sports car authority as one of the greatest sports cars ever made.  To this day, they can be seen beating Domestics and Imports alike.   
Smart Guy - "That '67 GTO with 402 cu. in. V-8 and Edelbrock High-Rise Intake with Supercharger will beat just about anything on the track."
Honda Driver - "yeah rite dawg my honda civic wit nawzZzZz port injeKshon wud OwNn that piese of america car crap"

ps - using the initials GTO to stand for anything Japanese should constitute a federal offense.  italians are still cool though (their cars (and cartoons) dont suck).