GM 8.875" & Toyota 9.5", 30 Spline,Nitro Mini Spool

12P 30 Spline Steel Spool, 4.10 & Up, 2-1/16" Deck, 1.785" Journal

12P GM 3.08-3.90 Eaton Posi Carrier Case, Bare 30 Spline

12P 33 Spline Steel Spool, 4.10 & Up, 2-1/16" Deck, 1.785" Journal

12P 35 Spline Full Spool, 4.10 & Up 2-1/16" Deck, 1.785" Journal

12P GM 4.11 & Up High Performance LSD

12P GM 3.08-3.90 High Performance Posi

GM 12P LSD 4.10 & Up 30 Spline (Eaton Carbon Fiber Clutch, 400 lb Springs)

GM 12P LSD 4.10 & Up 33 Spline (Eaton Steel Clutch 18, 400 lb Springs)

33 Spline, Requires Upgraded Axles.

12P GM 3.08-3.90 33 Spline Pro Posi

3.08-3.90, 30 Spline

12P GM 33 Spline Truetrac Posi, 3.08-3.90

12P GM 33 Spline Truetrac Posi, 4.10 & Up

12T 3.73 & Up, 12P 4.10 & Up Truetrac Posi

GM 12P Eaton Posi 4.10 & Up Complete 30 Spline

12P GM Eaton Posi 4.10 & Up Complete 30 Spline, 800 lb Sprgs

12P GM 3.08-3.90 30 Spline Detroit Locker

12P GM 3.08-3.90 33 Spline Detroit Locker Requires C/Clip Elim

12P GM 3.08-3.90 30 Spline ECTED Electric Locker & Limited Slip

12P GM 4.10 & Up 30 Spline ECTED Electric Locker & Limited Slip