HPI Racing 86866 Drive Gear 55T Diff Case Set Sintered Metal Firestorm RTR HO Figuers Kyosho lists this across the

Kyosho lists this across the MP9 TKI4 V2

Heavy Duty Nylon Construction

and the constant-velocity joints inside can wear from repeated articulation

It forms the backbone of Unitrack geometry

Restores factory fit and alignment

HPI Racing 86866 Drive Gear 55T Diff Case Set Sintered Metal Firestorm RTR HO Figuers Kyosho lists this across theHPI Racing 86866 Drive Gear 55T Diff Case Set Sintered Metal Firestorm RTR This is a genuine HPI Racing 55 tooth drive gear and diff case set in sintered metal for the Firestorm RTR. The sintered metal construction gives the drive gear serious durability for hard nitro running. If your gear or diff case has worn from long use, this factory set restores solid, dependable drivetrain performance with a direct installation. Genuine HPI Racing replacement