Mods and such.

DEpointfive0

Lets go through your list

1. How much would it cost to get a magnetic black paint job?

So much you should sell your car and buy a MBlack...
Realistically THE SHÍTTIEST of paint jobs would cost you 3-5k, and you'll devalue your car about 5k...
And if you want your car painted properly (all the door jambs, under the hood) you're looking at 10k, and still a 5k loss of value

2. How much would black rims lipped with red cost, and does the color of which the rims are lipped affect pricing?

Um... I'm not sure if you're asking if you're buying new ones or to paint/powdercoat yours...
Wheels can go from $800-4000 for a set, and you can get your, or any wheels powdercoated for sub $600

3. Is it legal to have colored light emit from your headlights, brake lights, etc.

Ask a cop. In CA, your car cannot emit light any color other than white, amber and red. And I'm pretty sure also every state is the same. (Small variances in laws, like in CA you cannot have red in the front of the car)

4. How much would it cost to have your lights emit a different color?

"EMIT" is vague, but lets assume you mean some sort of accent (Iron Man lights or halos)
And assuming you're doing it yourself... $50? (We have 50 threads on lights, look up "Dallaz"'s thread and/or "Nut_n_Much"'s thread on headlights
Message or look up 180Customs, they are a sponsor (you can find them on the front page) they have a pricing list

5. Can you have more than six characters on your license plate if you pay extra for it to be customized?

Yeah, 100% a state issue, TX was 5-6 depending on plate, CA is 7

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