Maserati needed an engine worthy of its grand touring flagship, so it did what almost nobody could — it called Ferrari. The GranTurismo’s 4.7-liter V8 was built by Ferrari in Maranello, making 454 horsepower, and Maserati reportedly took just nine months to take the car from design to production. Even the crankshaft is different from Ferrari’s, which is why the same V8 family sounds nothing like its red cousins. A Ferrari-built heart for the price of a used pickup truck. Lexus quietly stuffed a 5.0-liter V8 from the LFA supercar program into a compact business sedan and told almost no one. The IS F makes 417 horsepower, revs to 6,800 RPM, and pairs it with an eight-speed gearbox that downshifts like a racecar. Engines like this routinely clear 200,000 miles with basic maintenance — and with clean examples now at $30,000–$40,000, the secret is getting out.