HPI Racing Nitro Star F4.6 Engine - Low Compression/Gummy? As Is

Rare HPI Racing K4.6 Nitro Star Engine from Savage X SS Monster Truck used Good

HPI Nitro Star F4.6 2 stroke glow engine Good Shape - No Glow Plug

*RARE* HPI Racing Nitro Star K5.9 BIG BLOCK Engine w/ Roto Start & Accessories

Force FC .28 4.58cc 1/8 Monster Truck Nitro Enigine w/ Pull Start for HPI Savage

HPI Racing .21 3.5 Nitro Star Engine. Working

DYNAMITE MACH 26 NITRO ENGINE from HPI SAVAGE X BIG BLOCK 1/8 MONSTER TRUCK

Rare Vintage HPI Racing .25 3.5 Nitro Engine w/ Ugpraded GO Cooling Head