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The 999 Offroad HD Diff Covers are all made from 1/4" steel with 3/8"
flanges and welded inside and outside for incredible strength. They come
standard with alloy steel socket cap mounting bolts, which have a tensile
strength of 170,000 psi and can withstand 1,000 hours of salt spray
(countersunk stainless steel bolts are optional on some covers). These HD Diff
Covers are designed to withstand anything you can throw at them on the trail or
on the road. You will break something else on your rig before you break one of
The covers include a reinforced drain port! A fill port is not required as the AMC 20 has the fill port on the axle housing itself already.
**Note: These are made to order and can take from approximately 2-3 weeks to ship out.