These are ProTek R/C differential O-rings. These O-rings are slightly larger than the stock O-rings, so they seal the diffs better and help to prevent them from leaking oil. If you race the Mugen MBX5, MBX6 or MBX7 and you do not wish to constantly maintain your diffs, these O-rings are for you! (8 O-rings included per pack.)
ProTek R/C is an AMain Sports & Hobbies brand.
This product was added to our catalog on December 30, 2004
Sunday, Sep 22 2013 (about 5 years ago)
ProTek RC Mugen Differential O-Ring Replacement Set (8)
the O-rings are good I only did 1 side with the gear and nothing comes out.