Not really true... ehehe I'm from europe, and yes we have fartcanned and stickered cars over here...2.- If a car sounds fast it's because it's fast. European emissions and environmental controls are tighter than in the U.S. so people think it twice before putting a fart can exhaust with no use. A car with a coffee can exhaust tip usually means the car has a turbo and that not only the tip is 3" in diameter but the whole exhaust is.
3.- Sleepers rules: VERY little stickers, you will only see 1 out of 10 cars with sticker on doors, and if they have stickers it's because they DO HAVE those parts installed. Also vinyls are RARE. Wings? Not unless they are TUV aproved.