Literally straight-piping your car is one of the cheapest mods.
You actually have to pay more money if you want more performance and for it to be (relatively) quiet. That's one of the reasons loud vehicles are so common because and best solution for more performance is also the cheapest.
(It is more complicated than that, but this isn't the car community to where the nuances matter)
Ironically enough nobody in the world has been deterred from loud exhausts because of the cost. You literally just cut the muffler off, you can do it for under $10 working from scratch
It must be hard when your accomplishments are so little that no one notices you exist; i might be an obnoxious man child just to get people to notice me too.
but hey buddy, your mustang/challenger/Corvette is loud
Yeah, it's loud because it's a fucking sportscar, being loud is entirely in character and useful for the driver to hear out gear shifts on a twisty road.