Dumping exhaust down under the car

I don’t ever notice smell on the inside of my car so much, but when I get home from being around it, my clothes definitely smell. But I think it’s from when I’m outside the car while it’s idling. I have it tuned with a fatter idle and pump gas just seems to smell bad anymore on top of that. But inside the car, I don’t notice any exhaust smell. I have the floors sealed up good too to help prevent that problem.

The bad part as others have mentioned is dust. Any dirt on the road just clouds the car in a plume.