Originally Posted by forwardonly

Different Chassis, no battery cut outs, it is built for lipo. The body is different as well. The cam motor mount is awesome and much better than the original type. It comes with the V2 shocks that are easier to build. Not sure if it comes with the aluminum rear hubs, but they are nice. These are the most significant changes.

I still run the B44 and it is fine. There isn't a lot of performance upgrades in the B44.1, but it is a ton easier to build, adjust, and maintain.