My understanding is that the "reimagined" 152's are NOT Sparrowhawk. I had LyCon build my engine for the Sparrowhawk Conversion on my Aerobat last year and I had them do all their magic. It Dyno'd a 148 hp at 2800 RPM on the test stand which is the new red line with the conversion. It is a sweet flying little airplane. I just wish the Sparrowhawk Conversion added some additional take off weight