I recently took my WK off roading and afterwards now I am hearing a sort of raspy noise when the engine hits higher RPMs. It is not super noticeable, but it almost sounds like something is lose. I don't think it would be a hole in the exhaust because that would probably be heard at all RPMs. Anyone have any ideas? A local shop said they looked at it and they couldn't figure it out. I don't have anyone close to me right now that can look at it without charging me. Insight in the meantime would be great, thanks!