Rusted Exhaust Pipe

[Ratickle]

Something along this sketch. Your current system is cooling the headers with the water in the jacket. The fabricated elbow is also jacketed to cool the elbow. Then the water is dumped into the exhaust, approximately 10" away from the header and approximately 4" lower than the header and is inside the exhaust to cool the exhaust gasses so the entire system from there on never gets hot enough to cause any safety issues.

If a Tee is needed on the outside exhausts it would use the same principles. A 4" tee with hole drilled in it where the 5" tube is jacked over the first part of the Tee.