Here are all the options parts for the Xray T4F
Reference 06303165
Brand: XRAY
REAR SUSPENSION ARM - HARD - 2-HOLE - 303165
Reference 06305927
Brand: XRAY
NARROW ALU PINION GEAR - HARD COATED 27T / 48 - 305927
Reference 06305866-O
Brand: XRAY
OFFSET SPUR GEAR 96T / 64 - ORANGE - 305866-O