Mine is definitely the trend of doing “catless downpipes” and “resonator deletes” making your exhaust super raspy as a means of gaining more volume rather than doing a proper exhaust setup. Especially since high flow cats these days will flow more hp than most are making.
Is an instagram account window sticker a mod?
If it isn’t, I’m gonna say tinted/blacked out tail lights. A car with those will likely have an instagram sticker anyway.