This hardware kit includes all replacement gaskets, nuts, bolts, and washers that were included with “v1” TurboXS WRX, STi or FXT turboback exhaust system sold from approximately 2002 through 2010.  Exhaust systems made after 2010 require a different hardware kit (WS-HARDWARE-V2).  If you are not sure which one you have, look at the downpipe to midpipe joint.  If you have a “donut” gasket instead of a regular flat gasket you have the v1 exhaust and this is the correct hardware kit. ?