The 458 V8 engine will be coming to its end very shortly as Ferrari has been seen testing its’ latest 458M with a turbo engine. The 458M has been spotted twice in the last several months around Maranello. Ferrari seems to have two test 458M mules, one yellow and one black. In typical Ferrari fashion the 458M will get a few upgrades along with the engine package. The 458M twin turbo engine is said to be a 3.8liter V8 that creates around 660bhp.