Fat belly bars are made for competition,,,,, yes they do feed better,,, when u r racing and moving quickly the belly allows you to transition to the wood smoother because the radius of the belly which allows for a smaller initial contact point, hence,,, your chains speed to be affected less,,,, go to cannons website and look at the hot saw bars,,, most all have bellys!!!!
and the roller nose sprockets are separate because depending on your set up you may want to go different size roller
http://www.cannonbar.com/competition-bars/
How long is that super bar on tha big Husky??? 42?
looks really nice!!!!