This is a setup to convert our t3t4 turbocharger to an internal wastegate setup. The cast swing valve bolts directly to the 5 bolt turbine housing, and the adjustable actuator bolts to the back of the compressor housing. Included with buy it now is the pictured 2.5" vband flange, clamp and 5 install bolts, allowing the exhaust to be easily attached. The actuator is adjustable for different PSI levels, starting at 8psi and going up with adjustment or the use of a boost controller.