| BZM topend is rather pricey but yes it will go on to the Banshee without mods other than rejetting. Massive improvement in power and the quality is very impressive. However more power = more heat so make sure you get your Banshee radiator correctly set up or it will overheat. There is a thread about fixing the Banshee radiator it's a very simple fix.
You can weld the Banshee bracket back together but it is worth reinforcing it because I had mine crack twice. | 
