Quote:
Originally Posted by M3YUK
Gonna put some KW on it in a few weeks and was thinking about the jb4 too
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FWIW my 135i with just jb3 (older version of jb4) pulled on a friends E60 M5 up to 140; only then did we accellerate at the same rate for a second or too.
like I said, jb4 will transform your car
