Upgrade the drivetrain of your Baja 5B with these great heavy-duty option gears and options! In addition to stronger & more durable main diff gear and idler gear, you can also upgrade the pinion gear as well as change the drive ratio of your Baja!

Also available is an innovative pinion gear heat sink (#86712) which will further increase the durability of your Baja's drivetrain in race and hard running conditions! #85481 HEAVY DUTY DIFF GEAR 48 TOOTH #86485 HEAVY DUTY IDLE GEAR 30 TOOTH #86487 HEAVY DUTY DRIVE GEAR 20 TOOTH #86496 HEAVY DUTY PINION GEAR 16 TOOTH #86497 HEAVY DUTY PINION GEAR 17 TOOTH #86498 HEAVY DUTY PINION GEAR 18 TOOTH #86712 PINION GEAR HEAT SINK