Custom exhaust for a Na8

[Yeeooo]

Hey guys, I'm sure there might be a thread like this already but I can't for the life of me find it. Anyways, I'm looking to get a custom exhaust made for relatively cheap. I'm really looking for a louder exhaust that's wofable that has a clean but deeper tone. Pops and bangs are plus. Those of you that have experience with custom exhausts can you point me in the right direction? Originally, I was looking at a coby reso, some sort of muffler with mild steel mandrel bends but I don't really have a reference for how this sounds. Any videos or sound clips would be nice too!