I posted this in NASIOC as well but maybe someone knows here.
This is regarding the W51709 Control arm - lower inner front bushing installing onto an aluminum front control arm from a Subaru Impreza GC Sedan, MY94-00 STI
I was under the impression that W51709 bushing has a metal sleeve because it is being pressed into an aluminum part.

However the part I received does not appear as in (Fig.1) but looks like (Fig.2)
The Bushing in (Fig.2) looks like it's for the non-STI steel control arms.


This is what is shown on Whiteline's website as well as all the online stores that sell this part.
Fig.1



Fig.2 (What is shown below is not a whiteline part but describes what was in the whiteline product package)


Is it safe to use this part on the aluminum control arms?