I’m a little dissapointed in your post…
You of all people should know that it doesn’t matter how much money you put into your car.Yyou won’t get that money back.
Even if he had a pair of seats worth $4000 and a set of rims worth $3000. That wouldn’t add $7000 to the value of his car. And the S15 front end won’t add $2000.
If life were like that, you wouldn’t need a visa card.
But we really need to see pics and have more specific specs on the car.