I want to install a Kartboy short throw shifter with new bushings in my 04 WRX. I have read that you need to order a different Kartboy shifter depending on which Subaru shifter is in your car. They said the way to tell is that the STI shifter is gold and the WRX is gray/black. I checked and mine is gold. This points to the STI shifter. Is it possible to have an STI shifter in a WRX without have the 6 speed? I talked to a few mechanics at Subaru and they said there are only two options for Subaru shifters. The difference between the two is one is for a 5-speed and the other is for a 6-speed.