Quote:
Originally Posted by essi1553  This isn't true. Cams, Bore size, and crankshaft are all different between a M5x and S5x motors. (The M cars motors are S5x's, the 325i for examples had M5x's) |
I was commenting on the head. Bottom end is shorter and thicker cylinders which in my experience is better for running boost. Valve size and ports are same.
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