****! Balancer?

[wytstang]

How would i know if I need one?

Because it won't work with out the spacer you NEED it. Thsi is the one
http://mustang.c-f-m.com/index.asp?PageAction=VIEWPROD&ProdID=354
CFM is where I got mine as well, fast shipping...

 

[gcomfx.com]

No spacer needed for my Pioneer. It just bolted right on.

 

[Synned]

Well the one I got:
Professional Products 6.4 inch Damper for 5.0/5.8L (50 oz)
says its product number 80007.

Professional Products 4-Bolt Spacer for 80000/90000 Series Dampers
This Spacer is Required for Professional Products Dampers
So I guess I need one.