This is a bolt that screws into the discharge side of the turbine (turbo exhaust) housing that connect to the downpipe. This bolt is made from a special alloy to hold up to the extreme conditions at the turbine housing. Z32 stock turbos have two of these bolts along with two studs that connect the turbine housing to the pre-cat. When upgrading a Z32 to larger turbos with a 5 bolt exhaust flange you will need an extra bolt and an extra stud.
- 1990-1996 Nissan 300ZX (Z32)