Here are all the options parts for the Xray T4 2018 and olders
Reference 06308353-K
Brand: XRAY
ALU SHOCK CAP-NUT WITH VENT HOLE - BLACK (2) - 308353-K
Reference 06304972
Brand: XRAY
ALU GEAR DIFF CVD BB DRIVESHAFT ADAPTER (2) - 304972
Reference 06305409
Brand: XRAY
CVD BB DRIVE SHAFT 50MM - HUDY SPRING STEEL™ - SET - 305409
Reference 06902307
Brand: XRAY
HEX SCREW SH M3x6 SMALL HEAD (10) - 902307
Reference 06301351-K
Brand: XRAY
ALU ADJUSTABLE BODY POST STOP - BLACK (2) - 301351-K
Reference 06303142-K
Brand: XRAY
ALU SHIM 3x5x0.5MM - BLACK (10) - 303142-K
Reference 06305255
Brand: XRAY
ECS BB SC DRIVE SHAFT CASE - HUDY SPRING STEEL™ - 305255
Reference 06305395
Brand: XRAY
ECS BB SC DRIVE SHAFT PIN 2 x 8.4 (2) - 305395
Reference 06301233
Brand: XRAY
"X4 RUBBER BUMPER 3D WITH INNER ""H"" PROFILE - 301233"
Reference 06302663-V2
Brand: XRAY
COMPOSITE BALL JOINT 4.9MM - OPEN (8) - 302663-V2
Reference 06303141-K
Brand: XRAY
ALU SHIM 3x5x1.0MM - BLACK (10) - 303141-K
Reference 0148199
Brand: HIRO SEIKO
T4'18 Titanium Hex Socket Screw Set - 48199