Here are all the options parts for the Xray X4
Reference 06304932
Brand: XRAY
GRAPHITE GEAR DIFF BEVEL & SATELLITE GEARS (2+4) - LOW - 304932
Reference 06305136
Brand: XRAY
ALU SOLID AXLE DRIVESHAFT ADAPTERS - HARD COATED (2) - 305136
Reference 06305137
Brand: XRAY
STEEL SOLID AXLE DRIVESHAFT ADAPTERS - HUDY SPRING STEEL™ (2) - 30513
Reference 06305776
Brand: XRAY
OFFSET SPUR GEAR 76T / 48 - HARD - 305776
Reference 06305781
Brand: XRAY
OFFSET SPUR GEAR 81T / 48 - HARD - 305781
Reference 06305874
Brand: XRAY
OFFSET SPUR GEAR 104T / 64 - 305874
Reference 06305876
Brand: XRAY
OFFSET SPUR GEAR 106T / 64 - 305876
Reference 06305878
Brand: XRAY
OFFSET SPUR GEAR 108T / 64 - 305878
Reference 06306165
Brand: XRAY
T4 GRAPHITE BATTERY STRAP FOR LiPo - SET - 306165
Reference 06308029
Brand: XRAY
ULP ALU PROGRESSIVE SHOCK SYSTEM - SET (2) - 308029
Reference 06308274
Brand: XRAY
XRAY 4S SPRING-SET C=2.3 (2) - 308274
Reference 06308277
Brand: XRAY
XRAY 4S SPRING-SET C=2.9 (2) - 308277