4 synchro close ratio helical gear kit. See individual gears
22G1040 and
22G1371as this kit ontains laygear and 1st motion shaft only. For pre A+ gearboxes, converts standard gear ratio to "S" ratio.
If using the later A Plus type 18mm nose mainshaft with pre A plus gears only you will require
C-AJJ4032A 1st motion shaft