Well I got it figured out.
If you have a regular raptor G2 then tail boom (50H08-25) will be the one for you. I purchased the raptor premium edition which has a longer tail boom so it requires you to buy the boom with a new tail gear set (50H08-86). I think it is stupid to have to buy a new tail gear set also, but oh well its spare parts.
I learned this through trial and error since xheli and exceed-rc dont tell you the premium edition has a longer boom.