I've searched all the posts and still think my situation is semi unique. Purchased a 13' NC700 with 88,000 miles < ---- yes 88K, with original exhaust. The header is rusted real bad and no way to know if the system is working properly with those miles but I think so. Seems to sound fine, run fine, but I have nothing to compare to, my first NC. This is a semi budget friendly restoration project. Appearance wise I'd like to replace the header but I've either found new systems with only a de-cat, or just as crappy OEM headers on ebay. From reading here, a full system can actually lose power. In addition, sound wise, I would like to add an end can to make the bike sound a bit better, not necessarily louder. So technically I want a full system but not really with a de-cat if that makes things worse. So, what are my options?