Well, really, if the SDS requires users to have a special exhaust system, you should spell that out in the installation manual. "The impingement of exhaust gasses or flames onto the wires, sensors, injectors or the ECU unit itself will result in degraded operations of your EM-5 and voids the manufacturer's warranty."What sort of fellow would think it's ok to use aluminum for an aircraft exhaust system though?
Hey, the aluminum was lighter and easy to bend!
No fire? He was darn lucky. That's the nightmare I probably share with a lot of pilots--a fuel fire that I can't get extinguished. It would be a most bad way to sign off.