Directly bolt on for Nissan Skyline R32 R33 R34 2.0L-2.5L RB20DET RB25DET engine;. A direct Bolt on turbo upgrade for RB20DET and RB25DET for Skyline Engines!Will require a coupler to connect turbo to hotpipe but other than that its a OEM Bolt on with upgrade 3" air inlet and larger wheels for optimum power.