HPI's Nitro Star S-25 Engine with pullstart. This is the standard engine for the Savage 25 and the Savage SS monster trucks.

HPI K4.6 high output pull start engine for the HPI Hellfire

HPI exhaust header for an O.S. .21RG(P) to fit on a Savage.

HPI Nitro Star .15 size SS Black Engine with Pull Start for the RC10GT Gas Trucks.

HPI Fuelie 23cc Two Cycle Gasoline Engine used in the Baja 5B Buggy

HPI Nitro Star G3.0 Engine with Pull Starter used in the HPI Fire Storm.

HPI 6.5mm Rotary Carb./ABC/Standard Shaft/Side Exhaust/Heatsink Head/Black Crank Case.

HPI Fuelie 26S 1.6 cu in (26cc) Gasoline Engine used with the Baja 5B SS Kit.