Ok this question might seem a lil dumb but i'm a little confused too. I hear all these 4 bangers with the fart cannons on whatever the car and it seems that the higher the rpm they get to the louder their exhaust gets. Whereas with my car after about 3000 rpms, i dont hear the exhaust at all, or very little with my magnaflow muffler. Is this the muffler? Or the engine doing this? Or am i just crazy and this is a stupid thread?