Also, I'd also like to propose right now that a CAR LESBIANS character be limited to basically the following attributes:
Hot and Car are obviously in, as the defining features of a car lesbian. Although the way I'm picturing it, Car is a representation of the CL's skill at driving and maintenance, and not of her actual, physical car.
That will be taken car of by backgrounds which describe your car, in the same way your car lesbian is fleshed out by backgrounds that describe her while Hot is mostly just a measurement of how well she achieves things through seduction, subterfuge, and being a lesbian.
Finally, I think an underlooked attribute/thing that every car lesbian ought to have is a pit crew/harem. Since we're trying to keep this light, instead of being an npc or something a member of your crew would basically just another background.
Trunk, I guess, can be a measure of the total amount of these attributes you can have, whether they're car mods, personal features, or crew. It has to be something, because the name is awesome.
I imagine Drift being something like shift in FATE games, or the Crucial Mechanic in Sorcerer that lets you carry over successes from previous, related rolls.
Finally, the one thing we're seriously missing is some sort of Bad Thing that can happen to a car lesbian, something like a condition track or hitpoints. Perhaps failures apply penalties to your Hot or Car (or maybe disable backgrounds) and you're out (crashed, psyched out, exhausted, seduced, etc..) when you reach 0 in on of your stats?