All Boxster / Cayman Products G50 Torque Flow Limited Slip Differential G50 Club Limited Slip Differential PDK Limited Slip Differential Cayman 6-Speed Pro Limited Slip Differential Cayman 6-Speed Club Limited Slip Differential G50 Rebuild Kit for Getrag ’87-On $1,406 GT4 2.176 Close Ratio 2nd – 6th Gears with Mainshaft Kit $7,095 GT4 Close Ratio 3rd – 6th Gear Kit $4,495