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X-treme (Reinforced Aluminium) Finned Girdle
Gaskets

Most oils today are 'Multigrade' oils, which means that the oil is defined by 2 viscosity grades (i.e. 10w-40, 5w-30, etc)

Multigrades were developed more than 50 years ago to avoid the requirement of using thick oil in summer and thin oil in winter.
The W stands for winter, not weight, which means that the oil has a certain viscosity/flow at low temperature. A lower 'W' number means the oil performs better in cold temperatures.

The non 'W' number indicates the oil viscosity level at 100°C (212°F).This is a fixed limit, all oils that end in the same number (30) must meet the limits.

For differentials we recommend a 85w-140.

X-treme (Reinforced Aluminium) Finned Girdle
Gaskets
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Nitro Gear & Axle, Heavy Duty, Aluminum, Differential Girdle Cover GM 7.75", Borg Warner, 9 Bolt, Nitro Main Cap Stud Kit

GM Borg Warner 7.75" 9 Bolt, Main Cap Stud Kit

Price: $24.99
Nitro Gear & Axle Main Cap Stud Kit GM 7.5", 7.625", 8.2", 8.5", 8.875"-12 bolt Car & Truck, 12P & 12T, Nitro Main Cap Stud Kit

GM 7.5", 7.625", 8.2", 8.5", 8.875" 12 bolt -Car & Truck, Main Cap Stud Kit

Price: $27.95
Nitro Gear & Axle Main Cap Stud Kit GM 8.2" (BOP) Nitro Main Cap Stud Kit

GM 8.2" (BOP), Main Cap Stud Kit 3-5/8"

Price: $27.95
Nitro Gear & Axle Main Cap Stud Kit Chrysler, CHY, Dana & Ford, CHY, Nitro Main Cap Stud Kit

Ford 7.5", 8.8", 9", 10.25", D44, D60, D70, C8.75", C9.25" Main Cap Stud Kit

Price: $27.95
Nitro Gear & Axle, Heavy Duty, Aluminum, Differential Girdle Cover GM 9.5", 14 Bolt, Nitro Main Cap Stud Kit

Main Cap Stud Kit for GM 9.5" 14 Bolt

Price: $34.99