This seems like the right place to ask this... I am looking to reduce the overall volume of my exhaust system, without using cats. I plan on using a 3" borla hush catback to accomplish this, but I'm looking for an even quieter ride. What would be the best product to use to reduce decibles? Muffler, or a resonator? What are the differences? It would need to be a 3" design and I am looking to maintain flow while decreasing noise.