My current setup is a ProChamber and Borla Stingers, and it's just way too loud at cruise. It doesn't really "drone" that bad, the exhaust itself is just so loud that my friend says it actually shakes his gas pedal when he's in the car behind me. What mufflers do you guys recommend that I can get welded into my Borla catback (in place of the XR-1 mufflers) that will quiet it down? I want a straight through type muffler that is really quiet when cruising around. Ideas?