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.
Really wish enforcement was higher on this. Hell it’s frustrating to look at any retailer selling LED alternatives for older cars with halogen. Hilarious ads that claim that somehow their shit, totally legit LED light “scatters” correctly. Nothing more than a dangerous nuisance at best that simply lights brighter, but they can’t understand it doesn’t illuminate the road properly anyways…