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A performance cover is one of the single best things you can do to strengthen a 7.5- or 8.5-inch 10-bolt rearend. An integrated cap girdle helps stop gear deflection under load, which is caused by the main caps “walking”. To seal the deal, we bolted the custom Moser cover onto the housing, snugged the Allen studs against the main caps, and torqued them to 5 ft-lb. Then, we finished off the nuts with 10 ft-lb.