I personally wouldn't tap it myself. I would either have a shop do it, or just buy an aftermarket name brand with one that comes tapped brand new. The way I look @ it is, you're going to spend how much money on a turbo, plus installation, and a tune, why not just spend another $200 or so and buy an oilpan that comes tapped. I wouldn't want to take the risk of f*cking everything up. Call me paranoid, but that's my oppinion.