Don't buy off EBAY go to www.polarisoemparts.com anything over $50 is FREE SHIPPING

I got all the part numbers for the Header pipe and the snorkle mods. the 800 parts will fit on the 600/700's check the polaris forum.
800 Headpipe MOD
Header pipe- 1261445-029 $74.99
(3)Heat shields- 5244014 $3.32, 5248703 $1.46, 5248702 $1.46
Header to cylinder gasket- 5811511 $18.32
Header pipe to muffler seal- 3610047 $12.49

800 AIRBOX SNORKLE MOD
Airduct/snorkle- 5435932 $19.16
Airduct/snorkle gasket- 5411422 $3.96

both of these mods can be done without replacing the gaskets/seals due to them being the same part number as stock 600/700/800 models are all the same part number. the 800 header mod without gaskets will cost $81.23 and the Airduct/snorkle modwithout the gasket is $19.16. It woult make more sense to order the snorkle at the same time as the headpipe cause then you wouldn't have to pay any shipping due to it all being over $50.