Wood Stove Piping

cowboy13

First time wood stove installation here, and I have plenty of questions. I have an existing mason chimney, so I am basically just connecting the stove to a hole in the wall (90 degree bend in pipe).

1. My flue collar is 6" and the mason hole to my chimney is 8". Do I put the increaser at the chimney and use 8" pipe or do I put the increaser at the flue collar and use 6" pipe?

2. What piece attaches directly to the flue collar? And how does it attach? Obviously you cannot put screws through the iron flue collar to attach to the pipe. Does the pipe just rest inside the flue collar?

3. Is it necessary to have furnace cement on each joint? or just the 3 screws?

4. My hole to the chimney is slightly larger that 8 inches. When I put a section of 8 inch pipe into the hole it fits loosely. Is there an adaptor for stove pipe into chimney?

Thanks.