IMO the S65 is a far overrated engine and doesn't respond as well to mods as most like to believe. I honestly do not car about road racing(if you do, good for you but it's just not my thing) how fun the car is to drive on the street is all i care about.
I will tell you this, i ran a FBO m3 vs my FBO+ meth setup and I was easily 3-4 cars ahead at 140mph and he was not magically closing the distance.
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