These are the optional 2.5+0 Aluminum Rear Stub Axle Carriers from Traxxas Stampede 4x4, Slash 4x4 Nitro Rus and Nitro Step. (This is just like the stock tra1952)

Machined aluminum construction
Anodized Black in color

Two Aluminum Rear Stub Axle Carriers
Two 3x3mm Set Screws
Two 3x31.5mm Pins
Four 6mm E-Clips

Installation into Vehicle

When install
as Labeled 2.5+0= 2.5 toe in