yes FITMENT for the 2010 800's is the same as 2009 1000's, but just because it fits doesn't mean the airflow,backpressure, etc is the same. That is why a lot of companys are doing testing and the cans aren't available yet!
I personally wouldn't go slapping a 1000 can on my 800 just cuz it fits! Just my $.03
I personally wouldn't go slapping a 1000 can on my 800 just cuz it fits! Just my $.03