Traxxas 8150X Driveshaft Extension Kit (6 parts) for Long Arm Lift Kit TRX-4Traxxas 8150X Driveshaft extension kit, center (includes internal splined, x long (2), internal splined, long (1), internal splined, medium (2) & internal splined, short (1)) (for use with TRX 4 Long Arm Lift Kit) Replacement driveshaft kit for the extended center driveshafts used on the TRX 4 Long Arm Lift Kit. Includes extra long internal splined shafts (2), long internal splined shaft, medium internal splined shafts (2), and short internal splined