Specifications: 100% Brand New and High Quality Item Type:Limited Slip Locker Condition:New Warranty:1 Year Type:Posi Differential Axle Splines:28 Compatible Gear Ratios:2.73 Numerically Higher Gear Ratios (3.08, 3.42, 3.73, 4.11, 4.56, etc) Application:Chevy GM 8.5″ – 28 Spline Fitment Type:Direct Replacement Differential Type:Limited-Slip Material??Nodular Iron Casing Heavy Duty Composite Clutches, 400lb Springs Forged 4130 Internals Includes (2) Carrier Bearings (2) Carrier Bearing RacesPackage Includes: 1x 8.5″ Chevy GM Posi Unit – 28 Spline Limited-Slip Locker 2x Carrier Bearings 2x Carrier Bearing RacesApplication: Fits Chevy GM 8.5″ with 28 spline axles Axle Splines: 28 Compatible Gear Ratios: 2.73 Numerically Higher Gear Ratios (3.08, 3.42, 3.73, 4.11, 4.56, etc)