Here are all the options parts for the Xray X4F
Reference 06304971
Brand: XRAY
GEAR DIFF OUTDRIVE ADAPTER - HUDY SPRING STEEL™ (2) - 304971
Reference 06305772
Brand: XRAY
OFFSET SPUR GEAR 72T / 48 - HARD - 305772
Reference 06305781
Brand: XRAY
OFFSET SPUR GEAR 81T / 48 - HARD - 305781
Reference 06305869
Brand: XRAY
OFFSET SPUR GEAR 99T / 64 - 305869
Reference 06305878
Brand: XRAY
OFFSET SPUR GEAR 108T / 64 - 305878
Reference 06305918
Brand: XRAY
NARROW ALU PINION GEAR - HARD COATED 18T / 48 - 305918
Reference 06305928
Brand: XRAY
NARROW ALU PINION GEAR - HARD COATED 28T / 48 - 305928
Reference 06308029
Brand: XRAY
ULP ALU PROGRESSIVE SHOCK SYSTEM - SET (2) - 308029
Reference 06308277
Brand: XRAY
XRAY 4S SPRING-SET C=2.9 (2) - 308277
Reference 06308286
Brand: XRAY
XRAY 4S SPRING-SET C=2.6 (2) - 308286
Reference 06353561
Brand: XRAY
ALU REAR WING SHIM (2) - 353561
Reference 06306551
Brand: XRAY
XRAY PURE TUNGSTEN CHASSIS WEIGHT 12g - 306551