In the community I grew up in it was common to praise someone who lifted their truck, swapped out the exhaust system, added light bars, etc, and then deride someone who lowered their car, added hydraulics to make it bounce, installed low profile tires with large rims. Mostly this had to do with racism, but I never understood why one would be praised and the other wouldn’t when both take a lot of money and skill to do right.

Also, I think I get what you’re trying to say with ‘hard r’, but it does not mean ‘retarded’, it is a way to differentiate between ‘nigga’ and ‘removed’. And the way you used it, no matter the meaning you were going for, is still (ableist | racist) since the same meaning is implied. Not trying to be preachy, but it appears that you’re trying to not be offensive and I just wanted to help.

There are plenty of reasons to hate car mods.

1. You already mentioned coal rolling. But it’s a top reason to hate.
2. Loud exhausts cause noise pollution.
3. Straight pipes cause air pollution. A severe source of Asthma for children.
4. Some lifts and modifications to exterior dimensions are very dangerous for pedestrians and smaller cars. Same goes for modified blinding headlights.
5. Removing speed limiters are extremely dangerous because that’s untested territory from the manufacturer.