HPI 76970 Threaded Pinion 20Tx16 For R40

HPI 75026 R40 FRONT ONE WAY DIFFERENTIAL

HPI A726 Rubber S3M 5.0mm 135T Side Belt for Nitro R40 Discontinued (MK42)

Hpi racing NEW NOS (HPI 76956) R40 Spur Gear 46 Tooth (1M / 2nd Gear / 2-Speed)

HPI Racing R40 Nitro Touring Car Lightweight Middle Shaft Part # 33402

Vintage HPI Nitro R40 HARA Ed Front Lightweight Alum 36T One-Way Differential OS

HPI RACING 73481 R40 DIFF PULLEY SET 46T36T - HPI-73481

HPI Racing A905 Nitro RS4 /Super/Racer/RTR / Mini Ball Differential RC Car Parts