Well, I was able to keep my cats (no leaks, cracks) and I just got a 2.25" pipe welded to it which dumps out the back. No muffler. Honestly, it's pretty quiet cruising. It does drone though at 110km/h though, I don't know what RPM, my tach is dead, but it's at the same RPM in every gear under load. At cruising at 140km/h it sounds like I have a full stock exhaust, muffler and all.
For an $80, I'm very happy.
"Driving is like a narcotic, an addiction that can take over lives. It ruins people, breaks families apart, and even kills. Itís habit that needs to be fueled. Time, money, rationality, sweat, knuckle skin, and anyone who disapproves are of little importance to a driver, and are often overlooked. Hi, Iím Nelson, and Iím a drivaholic."