Best after market exhust pipes vlx 600 shadow?

"Best" is a subjective answer, but based upon my experience with using Cobra slash-cut pipes on my '07 VLX, I'd say they're definitely among the best. They offer a sound that makes the VLX sound bigger than the 600cc bike it is, and they reduce the "buzziness" of the stock exhaust that is such a heavy contributor to the bike's inherent vibration.