When i was interested in this mod i was looking around and didn't seem to find much info on it and since i knew it was a popular mod to do around here, i thought id buy a new one and compare.
Weight each of axle alone
Banshee- 11.2 lbs
Blaster-10.2 lbs
Blaster axle
Banshee axle
Here is a picture of the length difference
Pros
Helps keep you straighter out of a dead stop launch on the street
It's Lighter
Brings tires closer together which helps with traction and your E/Ts
Cons
Not as wide as stock