I made it!
Ford Mustang GT '2005
Choosing the body color was the hardest. I decided to use pearl color. Main color is white, light blue appears through it.
C-Mark is made from multiple circles and 3 electricity symbols.
Rainbow stripes have the same colors as Dash's mane and tail. They are so thin, because thick stripes looked bad. I added blue stripes to front and rear bumper so bumpers are not naked.
The roof is colored black - I like black roofs.
The car's sides were too blank, so I added "flames".
Then I added a racing number twenty! (get it?

)
The car is tuned. Custom side skirts, rear bumper, rear wing and an air scoop on the bonnet. I kept the original front bumper - custom bumpers lack the stallion emblem.
Oh and, that deformed red "blood" stripe, that comes from left front light and rear right is my personal "signature". All my cars have 'em.