It's interesting that the 458 is able to hold off the M6 here in the first race and win as that is exactly what should happen despite the way the tuned F10 M5 and F13 M6 are being portrayed. This is what happens when the car being raced starts in the correct gear and is ready to go.
Notice the excuses once the race is over, "We had wheelspin in 2nd and 3rd." But not in the other races? The M6 then demands another race and the 458 owner obliges but the M6 starts slightly ahead the second race and closes the gap quicker this time pulling eventually up top. Obviously Manhart was going to do this until they got the result and race they wanted.
These two races are the most accurate so far of those depicting these Manhart Racing Stage 4 packages for the M6 and M6 S63TU V8. The 458 will be the quicker car in the 1/4 mile partially thanks to its weight advantage but in a race well into the triple digits the turbos and horsepower advantage of the M6 will eventually take over if the race goes long enough as seen here. It just takes a while.
The 458 only needs a tune and exhaust, would be great to see a rematch. Video below.