Space Docker Vehicle
Completing the Spaceship Parts Collectible Mission unlocks the Space Docker, a modified dune buggy with a nifty interstellar skin and sound effects.
The Space Docker is a special Vehicle in GTA 5. The Space Docker is unlocked by completing the Spaceship Parts Collectible Mission and then returning to Omega.
The Space Docker is a modified dune buggy with a Tron-like color scheme and variety of electronic horn sounds.
Actual performance is unexceptional but the Space Docker does make a nifty conversation piece. In spite of the required collection of Spaceship Parts to unlock this vehicle, it is not a piece of alien technology. It's a piece of backyard engineering and is covered in sheet metal that looks like it was peeled from trailers. You can see rivets holding this thing together, and what appear to be jet engines are actually garbage cans.
Also, those green headlights look pretty sweet. The vehicle seems to have been inspired by the Back to the Future Delorean, with influences from 1950s era rocket/jet-themed concept cars.