What parts are need to get my e-maxx BL?

[Serum]

In order to use the 3.3 shafts, you need updated a-arms (easy to recognize by the slot they put in them in the center to give the fat shafts some clearance) knuckles, and the dustboots. and the turnbuckles/rodd-ends.

[A RC Dude]

Originally Posted by Serum

In order to use the 3.3 shafts, you need updated a-arms (easy to recognize by the slot they put in them in the center to give the fat shafts some clearance) knuckles, and the dustboots. and the turnbuckles/rodd-ends.

so why do i haft to get the dust boots? and i'm going to use 3.3 CVD's.