Rennlist found this very unique 1982 Porsche 928 for sale at Duncan Imports & Classics for $29,747. This Porsche 928 would have come with a 4.5 L or 4.7 L M28 V8. However Rennlist reports it is now powered by a Boeing T50 Turboshaft engine from a Gyrodyne QH-50 DASH. The car is able to run thanks to a reduction gearbox allowing for 300 hp at 5,950 rpm. Rennlist also reports the engine produces 130 decibels.
Source: Duncan Imports & Classics, Rennlist, and Ian Jones via Road&Track