Time: 1 Hour
On the right two exhaust pipes there gets a heater muff or shroud that creates hot air for a heat source. This shroud goes around the pipes and heats air that goes inside the shroud via a scat hose coming from the aft section of the engine baffles. Then the air leaves the shroud via a section of scat hose to the heater valve on the firewall. This came with the exhaust system from Vetterman and is pretty straight forward to install. 
You can see in the photos why I had to move the exhaust hangers to make room for the scat hose connections.