Original inside and out three owners since new. Complete logs and no damage history. This is a LYCOMING IO-360 conversion with a turbo. It is not a turbo normalizer with a fourth turbo control. It is a true turbo with the turbo integrated into the throttle and the engine is designed to run at higher manifold pressures. Typical cruise setting are 28 inches and 2400 RPM at 11 GPH doing 160 Kts. Otherwise it is a regular 201.