HP Model Engines are well known for their ultra high quality and design innovations.
A leader of model engine technology since the mid 1960's
they pioneered Schnuerle porting and rotary four cycle valves.

HP engines are produced with the latest computer controlled machinery and the finest materials available assuring you of unsurpassed quality. All engines feature hardened steel crankshafts supported by dual ball bearings, true hard chrome cylinder bores, low expansion cast pistons, forged con rods bushed at both ends, and high pressure alloy cast castings.

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