I bought a pair of Epcos but like others on the forum I found them to be a bit too loud and raspy so I went to the hardware store and bought two M20 stainless steel fender washers and had a local welder that does stainless weld them to the back of the rear flange of each baffle. The washers were the same outside diameter as the baffles so they fit perfectly. The result is a deep throaty rumble that is not too loud or raspy. The added back pressure also takes care of any popping on decel.
I don't know how to post pictures but if someone wants to see pics of this mod let me know and I will e-mail them to you.
