I would say, they don't necessary "like" or "dislike" cause the car is modded.
All they know is that its either "pretty" or "ugly". Since girls are not really into cars, its natural, and I find it quite... cute.
Like how guys don't know jack about make-ups. Its amazing when girls look at each other and say "you used different foundation today huh?"..
My girlfriend having a boyfriend who is obessed with cars, she began noticing the difference between "same brand" cars.
Like the difference between 5 series and 3 series. Its no longer an "
another bmw!", but "
oh thats a 5 series!".
Now, she learned how to notice a difference between modded vs stock.
"Oh, that 3 series doesn't look like the other 3 series." or "Wow, looks a lot better with those wheels(or bodykit)."
HUGE improvement. Im proud of it. My girl is so damn cute.