Here are all the options parts for the Xray T4 2018 and olders
Reference 06305132
Brand: XRAY
INNER DRIVESHAFT ADAPTER 3.5MM - HUDY SPRING STEEL™ (2) - 305132
Reference 06305158
Brand: XRAY
TIMING BELT PULLEY 38T FOR MULTI-DIFF - 305158
Reference 06305223
Brand: XRAY
ECS (ES) DRIVE SHAFT 50MM FOR 2MM PIN - HUDY SPRING STEEL™ (1) - 3052
Reference 06305251
Brand: XRAY
ECS DRIVE SHAFT COUPLING - HUDY SPRING STEEL™ - 305251
Reference 06305323
Brand: XRAY
DRIVE SHAFT 50MM - HUDY SPRING STEEL - 305323
Reference 06305326
Brand: XRAY
ALU DRIVE SHAFT SWISS 7075 T6 - HARD COATED - 52MM - 305326
Reference 06305333
Brand: XRAY
ECS ES (EXTRA STRONG) DRIVE SHAFT 50MM - HUDY SPRING STEEL™ - SET - 3
Reference 06305346
Brand: XRAY
ECS DRIVE AXLE FOR 2MM PIN - HUDY SPRING STEEL™ - 305346
Reference 06305390
Brand: XRAY
ECS DRIVE SHAFT PIN 1.5 x 8.5 - V3 (2) - 305390
Reference 06305577-O
Brand: XRAY
FIXED PULLEY 20T - LOW FRICTION - GRAPHITE (2) - 305577-O
Reference 06305716
Brand: XRAY
ALU PINION GEAR - HARD COATED 16T / 48 - SHORT -305716
Reference 06305779
Brand: XRAY
OFFSET SPUR GEAR 79T / 48 - HARD - 305779