V4 20 IN. STANDARD ROTATION
“S2”–TYPE GEARCASE

V6 20 IN. AND V4 25 IN. STANDARD ROTATION
“O”–TYPE GEARCASE

V4 25 IN. COUNTER ROTATION
“O”–TYPE GEARCASE

V6 STANDARD ROTATION, 25 IN. MODELS
“M2”–TYPE GEARCASE

V6 COUNTER ROTATION
“M2”–TYPE GEARCASE

V6 PERFORMANCE MODELS
“L2”–TYPE GEARCASE

