boring my 400ex

[brad_400ex]

im thinking about boring my 400ex out. what would be a good bore for it. i have heard 440s are good. and what are some cost.

[frogburner]

If I were you I would not go with the 440,,, You can still get lots of power from the 416, but I am fixing to rebore mine, and havent really decided what to do yet,, even though its all stripped apart..