HPI

HPI 1/4-28x8.5mm Pilot Nut HPI86076

This is the Stock Replacement Pilot Nut for the HPI Savage .21 Truck. This nut holds the flywheel onto the crankshaft.

HPI Super Heavy Duty Driveshaft Outdrive & Axle Set HPI100415

This is the HPI Super Heavy Duty Drive Shaft, Outdrive & Axle Set. This is a standard replacement set for the HPI Savage XL, but is an awesome upgrade for the rest of the Savage family of nitro monster trucks. These will upgrade any HPI Savage truck...

MACHINED HEAVY DUTY BEVEL GEAR 43T/13T SET HPI86922

The standard bevel gears for the Savage X 4.6, our strongest Savage yet, are available to fit into any Savage truck, to boost durability and drivetrain strength! Add this simple upgrade to reduce downtime, lengthen maintenance intervals and increase the...

HPI Gear Box / Bulk Head Set HPI85045

This is the replacement gear box/bulk head case set for the HPI Savage family of monster trucks. This is the case that houses the the front, and rear differentials. Note: This is not the replacement part for the Savage X monster truck.

HPI Differential Bevel Gear Set HPIA850

This is the Replacment Diff Bevel Gear Set for the HPI Nitro. This mounts inside the diff and are mounted to the output cups.

HPI Complete Sport Shock Set (4) (Savage/Savage X) HPI87056

This is a replacement HPI Sport Shock Set. These shocks are completely assembled, but may require shock fluid.

LOW SPEED NEEDLE VALVE WITH O-RING HPI15268

HPI Firestorm 10T Spur Gear (50T) HPI86901

This is a replacement HPI Racing 50 Tooth Spur Gear for the Firestorm 10T. 

HPI Spur Gear 49T (1M Savage) HPI76939

This is the replacement 49T spur gear for the HPI Savage 25 and Savage Limited Edition monster trucks. This the large center spur gear that attaches to the gear box and is driven by the clutch bell on the engine.

HPI Differential Gear Set (13/38T) HPIA855

This is a replacement differential final gear set from HPI Racing.

HPI 4 Bevel Gear Differential Conversion Set HPI87193

This is an optional 4 Bevel Gear Differential Conversion Set for the HPI Savage 25 RTR, and Savage SS monster trucks. This is also the same gear set that is included as stock equipment with the Savage Flux. The 4 gear conversion is a popular upgrade,...

HPI Light Weight Mod1 Idler Gear (29T) HPI86275

This is an optional HPI Light Weight Mod1, 29 Tooth Idler Gear, and is intended for use with the HPI Savage, Savage X and Savage Flux monster trucks. This light weight steel idler gear features a thinner profile with lightening holes machined in the face...