2000-2001 RMK where identical except for carbs, the 2001 had rack mount Mik's. XC vs RMK I believe is a different story i think more compression was run on RMK's. Buy my memory could be off on that...
I ended up sending the ones from eBay back and getting a different set from unionbay because the ebay ones wouldnt fit. Now I'm running 14:1 compression. Not to mention they look pretty sweet. Need to find a better place for high octane fuel though. Considering running avgas since it's really available to me and only about six bucks a gallon vs eleven but I'm not sure if the octane will be high enough.