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i've heard that ur m52 crank is already forged, the m50 nv con rods are forged, idk what stock pistons in which motor come forged also, but thats a cheap way to upgrade ur internals, i would also say bore it but since ur wanting forced induction i wouldnt change it, possibly dish pistons tho, and the m20's n the m50s nv engines come with dished pistons so do the s50. debating on where u want your power band u could change ur cranks, either have shorter throw crank with longer rods n have a better high end, or have a bigger crank with shorter rods n have more low end...all depends where u want ur power at. n also swap cams out, n get a set of double spring valve springs there like 20bucks each.
thats jus my opinion tho
_________________ 525i + autobahn = good times
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