Quote:
Originally Posted by SROC5
ditto
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If you ever want to look educated when you end talking to someone in the future about racing and BMW race engine variants. The DTM motor is the P66, completely unrelated to any production engine. The P65B44 in the Z4 GT3/GTE is derived from the S65B44. Feel free to look up the difference or in your case maybe start with looking up the definition of derivative.