This shifter drum kit is for Big Twin 5 speed 1988-1997. It dramatically improves the way your transmission shifts. A roller/detent design allows the shift drum to rotate to the correct position easily (OE style uses a plunger detent). Neutral is easy to find due to the dual neutral detens. CNC machined 6061 T-6 extrusion stock aluminum shift drum supports with inlcuded bearings.