Over the weekend my mechanic told me that my e39 exhaust needs to be replaced! The catalytic converter section sounds like a can with beans in it when rattled. This is my second exhaust system, the 1st one had similar problem and i had it replaced with a 2nd hand exhaust for RM1.8k. What are the options that i have?1. another 2nd hand exhaust (... & start saving for my 3rd set of exhaust)?2. have the current exhaust fixed (possible)? Any help/advice would be great. Thanks in advance.