JMBV Performance Converter Kit GM-RK-23 Transmission Unit: 6L80, 6L90 Core: GM 300mm Dampered: Yes Lockup: Multi-Plate Unit Size: 300mm Clutch Material: Woven Carbon Turbine Hub Input Spline Count: 36
JMBX Performance Converter Kit GM-RK-21 For street/strip and towing applications. Transmission Unit: 6L80, 6L90 Core: GM 300mm Dampered: Yes Lockup: Multi-Plate Unit Size: 300mm Clutch Material: Woven Carbon Turbine Hub Input Spline Count: 36