Should I make my car louder ?

It sounds cool for the first 5 minutes. However when you are simply going down to the supermarket to get bread and milk and you car is going 20mph and it's making a ridiculously loud noise I don't think most of us are impressed. I think most people just think he was stupid enough to spend £100s to make it sound loud, disturbing the piece and quiet.

You can if that is what you want to do

Don't. Noise pollution is awful. I'm really old. I'm and exceptional shot. I'm thinking about going cruising, with the intention of killing people with loud  cars and loud music. At my advanced age , life in prison isn't much of a deterrent, any more.

people will look at like ur a jackass. it is dumb people who are not bothered by loud noises cause the loud noises have damaged part of their brain

Even more of a loser if you have to ask.