Ok i think the flaming has gotten old now, and its not that hard to go up to Lowes, Home Depot, or your local hardware store and look at the engines these things have on them, there all high power and high cc rated. Some may need modifications to work with a Baja, some dont. Either way, for the same power and cc ratings as some Zenoah, Fuelie, or DDM/Chung Yang engines, they sure do cost alot less money because they dont say "For HPI Baja 5B" on them. Its kinda like how aluminum parts are WAY overpriced.