HPI stock replacement exhaust manifold for the Nitro 3. This part connects the tuned pipe to the crankcase.

HPI Heavy-Duty Gear Shaft 5x37mm (Silver/2pcs).

HPI Teflon Clutch Shoe Set Nitro Rush.  Optional Teflon Clutch Shoes and Springs for all HPI Nitro vehicles. These shoes are located in the clutch bell.

HPI heavy-duty differential shaft 5x26x7mm (Silver/2pcs).

HPI Heavy-Duty Gear Shaft 5x38x7mm (Silver).

HPI beveled differential gear set for the Nitro RS4 3. These gears are located in the differential.

HPI Heavy-Duty Cup Joint 7x19mm (Silver/D Cut).

HPI Nitro 3 radio tray set.  This is a stock radio tray set for the HPI Nitro RS4 3 RTR. This supports the radio components on the chassis.

HPI Heavy-Duty Cup Joint 5x10x18mm (D Cut/Silver).

HPI replacement lower mount set for the RS4 MT 2. These parts are located below the bulkheads.

HPI Hex Wheel Hub 12mm (Silver / 4pcs).

HPI rear axle with hex hub for the Micro RS4.

HPI Center Shaft for the Nitro RS4 MT2.

HPI air cleaner 30mm for the .12 to .15 Size Engines. This part mounts to the carb and keeps dirt from the engine.

HPI replacement brake cam and shafts for the Nitro RS4 MT.

HPI rear hub set for the Nitro RS4 3. The rear axles are supported by the hubs.

HPI stock replacement recoil flywheel for the Nitro RS4 3. This is the part that holds the clutch shoes.

HPI package of stock replacement ball cups for the Nitro RS4. These ball cups are also used on other vehicles.