Tremec 6 Speed 5th/6th Solid Billet Keys & Springs, #C7-3 & C7-4, an upgrade over the stock keys and springs that are easily damaged. #C7-3 & C7-4 in Transmission Diagram

Tremec 6 Speed 1st/2nd Solid Billet Keys & Springs, #A24-3 &  A24-2, an upgrade over the stock keys and springs that are easily damaged. A24-3 &  A24-2 in Transmission Diagram  

Tremec 6 Speed 3rd/4th Solid Billet Keys & Springs, #A37-4 &  A37-2, an upgrade over the stock keys and springs that are easily damaged. A37-4 & A37-2 in Transmission Diagram  

Tremec T56 Countershaft 5th/6th Synchronizer Keys, sold as a set of 3.  #C7-3 on the T56 Transmission Disassembled View  

Tremec T56 Countershaft 5th/6th Synchronizer Spring Set, sold as a pair only.  C7-4 on the T56 Transmission Disassembled View. FREE SHIPPING IN THE US 48 STATES  

Tremec T56 Reverse Synchronizer Key Retainer.  #A15-5 on the T56 Transmission Disassembled View

Tremec T56 Reverse Synchronizer Keys, sold as a set of 3.  #A15-3 on the T56 Transmission Disassembled View

Tremec T56 Reverse Synchronizer Spring Set, sold as a pair only. #A15-4 on the T56 Transmission Disassembled View. FREE SHIPPING IN THE US 48 STATES  

Tremec T56 3rd/4th Synchronizer Keys, sold as a set of 3.  These are OEM keys.  #A37-2 in the T56 Disassembled View  

Tremec T56 3rd/4th Synchronizer Spring Set, #A37-4 in the T56 Transmission Disassembled View