The springs that hold the pipe to the manifold are prone to breaking, they vibrate a lot. Missing and broken springs is a maintenance item, kind of like changing plugs. I take some RTV silicone and put a bead down one side of the spring, it helps to prevent vibration and adds to the life of the spring.
As far as the triple pipes... a lot of the XCR's came with triple pipes, so it could be the stock exhaust system. Find your sled here
http://parts.polarisind.com/Browse/Browse.asp
I would keep the triple pipes, when they are set up right, you have a pretty substantial hp increase over a single pipe. And there is NOTHING like the sound of a triple/triple!
Good luck!
__________________
Rebuilding the fleet!
2008 RMK 600 155", 2006 RMK 600 144", 98 Indy 440, 95 Prowler 550 2-up, 1990 Indy 650
RIP, destroyed by fire 1-22-2008

04 RMK 800, 05 RMK 600, 02 RMK 800, 97 RMK 700