[husker boxster]

It depends on the mechanic. Some will, some won't. Remember they're making a bit of money on the parts they sell you. They buy them at wholesale and charge you retail, so by supplying the parts you're cutting into their profit. They will certainly charge you for the labor to install the parts.

That said, my Porsche dealership installed Tarett bushings for me that I supplied. So you won't know until you ask.