Hi, i want to improve the sound of my exhaust, but i don't want it to be super loud and i'm not ready to invest in a new exhaust system. I want something that will provide a 25-50% increase in volume (i prefer deep tones). Would replacing the stock muffler with a turbo muffler improve the sound? I want the sound to be barely noticeable during normal daily driving and more noticeable at around 3500-4000 RPMs. I want something louder that i can enjoy, but not too loud to attract immediate attention. Thanks!