[Sivik]

you tap it off the oil pressure sensor. its above the oil filter and has a wire coming off of it. its like a 23-24mm bolt. or you can buy a block adapter (Greddy or AC Autotecnik) that installs with your oil filter and has 4 taps to run oil related things (turbo feed line, oil pressure gauge, etc). just look above your oil filter and you'll see it.

you'll need a t-fitting for it to work off the pressure sensor.

hope this helps...