What/ where is said resonator?
Midway through the exhaust system (approx under rear passenger footwell) sits a box - to increase the noise, people (mainly US based) cut this out and have a non res pipe welded in.
If you look at aftermarket systems, such as Miltek, you will have the option to go 'res' or 'non res', and two pipes are supplied in the system. Pick you're poison: 1) Loud, or 2) Louder