This is the Extra Hard 13 Tooth 32 Pitch Blackened Finish Pinion Gear from Robinson Racing

Genuine HPI Racing replacement part #110612

or make a hole in your

Genuine Traxxas replacement part #7019R

Tekno TKR6635C Center Differential Top Plate & Fan Mount (Carbon Fiber) EB410

Powerhobby 4s 15.2v 6000MAH 120C Graphene + HV Lipo Battery XT90 Plug Soft Case HO Figuers This is the Extra HardPowerhobby 4s 15. 2v 6000MAH 120C Graphene + HV Lipo Battery XT90 Plug Soft Case 120C Continous 240C Brust Description The Powerhobby 4S 6000mAh LiPo Battery delivers high output power, strong acceleration and extended runtime for demanding RC applications. Its large 6000mAh capacity makes it an excellent choice for compatible 1 10 and 1 8 scale RC cars, trucks, buggies, boats, airplanes and drones. Choose from 100C standard LiPo, 120C Graphene+ high