I really want people to hear my engine, i want them to think that i have a V-8 in there, i noticed that a lot of you guys have a U-bend delete, is that more for performance or for sound, i want to add some horsepower to my car, but not that much bcuz i can only go so fast b4 i get caught, luckily i havent been caught at all. Should i get a complete exhaust system or just some mufflers and a U-bend delete. Also what does the resonator do and should i get it removed also?

The engine on my car is kind of dirty also bcuz i didnt have the car til last year when my parents gave it to me, (i still have to pay for insurance and gas so dont think im spoiled, and trust me insurance is a pain) Is there like a spray i can get just to spray on and it will dissolve the grime, or do i have to take it to somebody and have them do an engine detail???