Make sure you pay close attention to the part number starting with 24 and the part numbers starting with 25 in my post. that difference could be confusing.
Here's the problem: After about 1-2 minutes of idling, the exhaust starts to glow red - starting at the point where the exhaust pipes enter the muffler and then proceeding to make the entire muffler and pipes red (if I let it get that far) Here's the engine info: 2005 Kohler CV730s (CV...