HPI 75026 Front One Way Differential 38 Tooth R40 Diff Part Nitro Touring Car RC

HPI 76970 Threaded Pinion 20Tx16 For R40

HPI Racing Clutch Parts for the Nitro R40

Vintage HPI Nitro R40 Hara Edition 33402 Lightweight Middle Shaft NEW NIP RARE !

HPI Racing Vintage RC Car Part # 33402 Lightweight middle shaft for R40

HPI NITRO RS4 3 FRONT/REAR DIFFERENTIAL

HPI Front Suspension & Diff Spring Set Micro RS4 Differential Part RC 1/18