Based on their findings and consultations with a few engineers, it appears that this future BMW M5 fighter has a twin-turbo V8. Specific clues include the visible cooling fins on what appear to be a pair of intercoolers behind the intakes on both corners of the front bumper. Going with this setup actually makes sense for GM because it will likely allow the new CTS-V to achieve the desired performance while keeping fuel economy in check and, at the same time, keep the Z06's exclusiveness intact. But remember, the new CTS-V will need to produce at least 550-560 horsepower in order to take on both the M5 and Mercedes E63 AMG.