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Viper Grip posi, GM 9.5" rear, 33 spline

Viper Grip Limited Slip Positraction Unit, GM 9.5″ (14 Bolt Cover), 33 Spline, 1979-2013 (VGGM9.5-33-1)

Viper Grip posi unit, GM 9.5" (12 bolt cover) rear, 33 spline

Viper Grip Limited Slip Positraction Unit, GM 9.5″ / 9.76″ (12 bolt cover), 3.42-Up, 2014-18 (VGGM9.5-4-33-12B)

Differential ring & pinion GM 8.5" / 8.6" rear

Viper Gear ring & pinion set, GM 8.5″ / 8.6″, 4.10 ratio, rear differential VGRPGM8.6-410