For sale is an AFCO 9310 premium quick change gear set #15.  This is a 19 and 20 tooth set and in a 4.11 ring and pinion rear end yields 4.34 final ratio and in a 4.86 ring and pinion rear end yields 5.11 final ratio.  This is a REM'd gear and in excellent condition.  Thanks for looking and as always I combine shipping when possible.