For the turbo guys, I've got the hp performance twin kit on my 04. They are mounted as high as possible and scavenger pump installed as well, In an attempt to solve my 50 oil leaks due to the drain back system, I put on 5/8 clear reinforced tubing to watch everything going on. Is this size sufficient? Originally they used heater hose tubing, but the oil would heat it up, cause the line to sag, back fill into the turbo and blow out the seals. I thought about using some of the aluminum tubing with an fittings or just using braided line. I still haven't cured this leak problem, and it liked to puke out on the dyno. I have made catch cans, smaller inlet lines, and restrictors and I can still see oil backing up.