TurboWorks Blow Off Adapter Made of solid aluminum by CNC method Allows for adaptation of HKS Mounted Relief Valves to serial intercooler Fits: Nissan Skyline R32 R33 R34 GTST GTR Bolt Spacing: 87mm TurboWorks Blow Off Adapter Made from solid aluminum by CNC .Allows the adaptation of wastegate valves with HKS mount to a series intercooler. Fits: Nissan Skyline R32 R33 R34 GTST GTR Dimensions shown in the last photo in the gallery.