I put on my 6x2x6 Cobra pipes on today. Three things: one, they are very deep throated and fairly loud in the middle of the torque range. Two, I usually boycott Cobra products because they usually stamp their name all over the product and they did put a medium sized logo at the end of the middle pipe this time. Three, for you Valkyrie riders looking to regain the loud rumble at every right hand twist, this is not it. The sound is impressive in its BASSO qualities but it sounds more like a 1960-1970's big block V8 with half-used glass packs. I will leave them on for now; but, I will also be open to other options.