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.
I can’t commit to only one? I’d say those ridiculous exhaust systems that sound like the vehicle is backfiring and popping and my goodness why do you have to make it sound like crap?