Here are all the options parts for the Xray XT4
Reference 06335080
Brand: XRAY
DIFF PIN (2) - 335080
Reference 06363512
Brand: XRAY
LEXAN REAR WING 2.0MM (2) - 363512
Reference 08106053
Brand: HUDY
SET OF REPLACEMENT DRIVE SHAFT PINS 2.5x10 (10) - 106053
Reference 08293561
Brand: HUDY
HUDY ALU REAR WING SHIM (2) - 293561
Reference 06363511
Brand: XRAY
LEXAN REAR WING 1.5MM (2) - 363511
Reference 06364978
Brand: XRAY
COMPOSITE CENTER DIFF SPUR GEAR 78T / 48 - 364978
Reference 06365357
Brand: XRAY
"ALU WHEEL HUB 12MM - OFFSET ""+2.25MM"" (2) - 365357"
Reference 06365878
Brand: XRAY
COMPOSITE 3-PAD SLIPPER CLUTCH SPUR GEAR 78T / 48 - 365878
Reference 06940512
Brand: XRAY
BALL-BEARING 5x12x4 RUBBER SEALED - OIL (2) - 940512
Reference 06930815
Brand: XRAY
BALL-BEARING 8x14x4 STEEL SEALED - OIL (2) - 930815
Reference 06303122-K
Brand: XRAY
ALU SHIM 3x6x1.0MM - BLACK (10) - 303122-K
Reference 06323513
Brand: XRAY
LEXAN REAR WING - RANK - 323513