Hey guys little background, was driving in very serious rain today was extremely heavy and a really loud knocking noise began. You could also feel it in the floor pan. Was very scary. After some extensive research it appears that it's an exhaust issue. Apparently the cold water on a hot exhaust = very bad vibration, shaking and is causing the exhaust to hit the under side of the car. One chap said he had fixed this issue by upgrading his exhaust hangers to stiffer polyurethane ones. My questions are; How many exhaust hangers are there on a vz executive standard exhaust system? Are all the hangers the same? (Shape) Can you get polyurethane replacements and where can I get them? Also any tis on replacing them would be great Thanks in advance.