Here are all the options parts for the Xray T4 2018 and olders
Reference 06308354-K
Brand: XRAY
ULP ALU SHOCK CAP-NUT WITH VENT HOLE - BLACK (2) - 308354-K
Reference 06308042-K
Brand: XRAY
ALU SHOCK ADJUSTABLE NUT - BLACK (2) - 308042-K
Reference 06308353-K
Brand: XRAY
ALU SHOCK CAP-NUT WITH VENT HOLE - BLACK (2) - 308353-K
Reference 06302590
Brand: XRAY
ALU DUAL SERVO SAVER SCREW M3x7 - SWISS 7075 T6 (2) - 302590
Reference 06302525-K
Brand: XRAY
ALU DUAL SERVO SAVER ARM BLACK + BALL-BEARINGS (2) - 302525-K
Reference 06305339
Brand: XRAY
CVD BB DRIVE SHAFT 50MM - HUDY SPRING STEEL™ (2) - 305339
Reference 06305409
Brand: XRAY
CVD BB DRIVE SHAFT 50MM - HUDY SPRING STEEL™ - SET - 305409
Reference 06303434
Brand: XRAY
ALU ANTI-ROLL BAR BUSHING o2.0mm - 6MM (2) - 303434
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 06303141-K
Brand: XRAY
ALU SHIM 3x5x1.0MM - BLACK (10) - 303141-K
Reference 06309861
Brand: XRAY
SHORT LiPo BALANCING CHASSIS WEIGHT 40G (2) - 309861