I'm just going to point this out, but next time use the search bar. There are SO many threads on this. and I mean SOOOOOOOOOOOOOOOOOOO Many. Anyway
Yes Banshee axles do fit in blaster axle carriers. However, if you have an 88-02 blaster, you need to get an 03-06 brake hub, otherwise it wouldnt fit. But if you have an 03-06 blaster, a banshee axle is a direct swap. Stock shee axles I believe are +3 3/4" - +3 5/8" wider than stock blaster axles.