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Originally Posted by flinchy
Thats pretty meh, unless its pretty tight from factory, +80hp is what.. 1psi and optimized afrs and advanced timing?
Throw on a turbo back and up the boooooost! Even n54's are hitting 450-500whp and they're a much smaller 6 with much smaller turbos!
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So what do you think are the potential of the M5 engine?