ATF or 5w30. Mike L. recommends 5w30 for those that have evaporation issues in the case with ATF. ATF is a better lubricate over the 5w30 but it breaks down faster and will evaporate from heat much easier.
downpipe comes out of the back of the trubo and connects to the exhaust. up pipes come out of the exhaust manifolds and connect to the bottom pedisal part of the turbo