March 5, 2004 Ottawa Senators at Philadelphia vs the Flyers.
419 penalty minutes most of them coming with under 2 minutes left in the game.
Game summary including the long list of penalties can be found here.
Good thing the league has taken steps to reduce fisticuffs recently. It is quite obvious by the video that fans do not like the fights. I just wish the league would stop pretending that is true.

Part 1

Part 2

Part 3