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[kevin_s_08]

estimate for a head port and polish and a bore on a bmw m42. its dohc if that makes a difference. i was also wondering if you dip the block when you do that as well.

[4sfed]

We do not bore blocks. A machine shop would have to do that. The head porting would run $500-600. This price is if you bring in a bare head. If I have to disassemble/assemble it, it would run another $160