Here are all the options parts for the Xray T4 2018 and olders
Reference 06305253
Brand: XRAY
ECS DRIVE SHAFT COUPLING FOR 2MM PIN - HUDY SPRING STEEL™ - 305253
Reference 06305138
Brand: XRAY
SOLID AXLE ECS BB DRIVESHAFT ADAPTER (2) - 305138
Reference 06930154
Brand: XRAY
BALL-BEARING 1.5x4x2 STEEL SEALED - OIL (4) - 930154
Reference 06302711
Brand: XRAY
BRASS FRONT LOWER 1-PIECE SUSPENSION HOLDER - FRONT - FF - 302711
Reference 06303120
Brand: XRAY
SET OF ALU SHIM (0.5MM, 1.5MM, 2.5MM) - 303120
Reference 06303801
Brand: XRAY
ANTI-ROLL BAR FOR BALL-BEARINGS - REAR 1.1 MM - 303801
Reference 06305252
Brand: XRAY
ECS DRIVE SHAFT CASE FOR 2MM PIN - HUDY SPRING STEEL™ - 305252
Reference 06305334
Brand: XRAY
ECS ES (EXTRA STRONG) DRIVE SHAFT 51MM - HUDY SPRING STEEL™ - SET - 3
Reference 06305823
Brand: XRAY
ALU PINION GEAR - HARD COATED 23T / 64 --- Replaced with #305973 - 30
Reference 06308036
Brand: XRAY
COMPOSITE NON-ADJUSTABLE PISTONS - DELRIN - V3 - 308036
Reference 06308286
Brand: XRAY
XRAY 4S SPRING-SET C=2.6 (2) - 308286
Reference 06309854
Brand: XRAY
PRECISION BALANCING CHASSIS WEIGHT CENTER 30 G - 309854