Anyway
This indeed looks very much deffo like std kh cyl moded to look like KR type spigot... Real KR spigots are longer...
As for "people who should know that told me so", well, that's not proof... I'll check the race part books to see what it says about KHR cylinders...
Since that KHR is actually only an engine in much later suit, at least make sure it is what it claims to be...
Patrick