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 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

12T GM 3.73 & Up 30 Spline High Performance LSD

12T GM 2.76-3.42 30 Spline High Performance LSD

12T GM, 2.76-3.42 Eaton Posi, 30 Spline

12T GM, 3.73-5.38, Eaton Posi, 30 Spline..

12T 3.73 & Up Detroit Locker

12T GM 2.76-3.42 30 Spline ECTED Electric Locker & Limited Slip

Limited-Slip-to-Locked, Select-able Locking Differential.