I've been looking to put some upgrades on a 2002 Polaris XC 600 and I have been browsing some sites such ### www.mcbperformance.com and startinglineproducts.com. I was looking at different pipes and the description said "big block only" or "small block only" i was just wondering what the difference was.

How wierd is this. I just posted this exact same reply to another post...

98-99 were big block 600s sharing the same basic "block" as the 700s
00-current are small blocks sharing the same basic "block" with the 500s

Thanks. :D