Actually, you're wrong, the FI did set just from removing cables on the 636. I know, I was there. I didn't remove the servo for 4 days, until the servo buddy came in the mail. Like magic, the FI light went off.
And my bad for offending you with the term "Exhaust" as in everything but the "Header", unless you prefer "manifold". 99% of people do not purchase that component, as the performance vs. Cost is not worth jack to them. Therefore, we call mid pipes and slip ons "Exhaust". You sound like you may need a snickers good sir. Or maybe a nap. Enjoy whichever you choose. ?