UNBROKEN is probably right that aftermarket quality is probably better quality on this pipe, but my dealer replaced one side of mine along with a catalytic converter at about 50K miles under warranty. I did think they shorted me by not replacing both sides, but the odd sound did go away with what they replaced. On the new flex pipe it appears that they moved the flex section closer to the catalytic converter, maybe in hopes of it lasting longer by putting less stress on it.