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Originally Posted by firefly948
I have a 97 540i, and someone told me that it is the same engine that isin the m5, just tuned down a bunch. I want to know how i can get around 400 hp out of it. Thanks guys.
Chris
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The 540's engine isn't the same as the M5. The 540's engine is a 4.4 Liter while the M5 has 4.9 Liters. There are multiple options for increasing power, it all depends on how much you want to spend.