When I was 17 I thought loud exhaust was cool.
Now I think not offending cops is cool.

If I was serious about quieting it down, to avoid getting officially screwed, at least until some time passes by, I would shrink down the
final pipe and/or muffler. Smaller diameter pipes are quieter than large diameter ones. Keep it too loud and you can bend over and hold your hand out for the next ticket.........

I also install sound diffusers that quiet an exhaust with no loss of power, but I would need to know the diameter of the final pipe to know
if it would work on your car.

When you arrive at the final pipe/muffler size, PM me with that measurement.-Bob