Here are all the options parts for the Xray X4
Reference 08293086
Brand: HUDY
HUDY PURE TUNGSTEN WEIGHT THIN - 24.5x24.5MM - 15g - 293086
Reference 06301078
Brand: XRAY
X4'23 GRAPHITE UPPER DECK - SPLIT REAR - 2.0MM - 301078
Reference 06308176
Brand: XRAY
XLP SPRING-SET C=2.6 (2) - 308176
Reference 06303120
Brand: XRAY
SET OF ALU SHIM (0.5MM, 1.5MM, 2.5MM) - 303120
Reference 06303121-O
Brand: XRAY
ALU SHIM 3x6x0.5MM - ORANGE (10) - 303121-O
Reference 06304971
Brand: XRAY
GEAR DIFF OUTDRIVE ADAPTER - HUDY SPRING STEEL™ (2) - 304971
Reference 06308277
Brand: XRAY
XRAY 4S SPRING-SET C=2.9 (2) - 308277
Reference 06980157
Brand: XRAY
PIN 1.5x7.3 (10) - 980157
Reference 06304972
Brand: XRAY
ALU GEAR DIFF CVD BB DRIVESHAFT ADAPTER (2) - 304972
Reference 06302180-H
Brand: XRAY
X4 CFF FRONT LOWER ARM - HARD - RIGHT - 302180-H
Reference 06302181-H
Brand: XRAY
X4 CFF FRONT LOWER ARM - HARD - LEFT - 302181-H
Reference 06302181-M
Brand: XRAY
X4 CFF FRONT LOWER ARM - MEDIUM - LEFT - 302181-M