Want early 2000s luxury and the ability to build a 1000-hp car? Well, the Lexus GS300 might be the perfect car for you.

Not only did someone shove a Cold War-era Rolls-Royce Viper turbojet engine in the back of this one, but its four-cylinder ICE powertrain is still there.

Engine swaps are a dime a dozen, especially LS swaps. Those ahve become so common that there’s a mock-up tool designed to ...