Replacement 66T Spur Gear for the RS4 Sport 3 Flux.Will fit the standard RS4 Sport 3 but can only be used with a pinion between 31T & 37T:#6931 - PINION GEAR 31 TOOTH (48 PITCH))#6932 - PINION GEAR 32 TOOTH (48 PITCH)#6933 - PINION GEAR 33 TOOTH (48 PITCH)#6934 - PINION GEAR 34 TOOTH (48 PITCH)#6935 - PINION GEAR 35 TOOTH (48 PITCH)