X2 leave the stock pipe on it. Unless you have ALOT of tuning experience leave it alone.
I got the pipes from the same guy I got the sled from and he said they were on it before. He didn't mention anything about changing anything when he put the stock one back on. Should I be concerned? The sled is a 1999 440 MXZX race chassis with a 2000 twin 700 motor in it. I don't know if the pipes were for the 440 or the 700. I really don't like taking my sleds to my local Doo dealer because they aren't helpful to say the least. If I do choose to go that route, how many hours labor should they be charging me do you think?