Cool bro!!! What mods do you have on your gst? You shoud buy an evo!! The 2003-2005 evo 8's are getting really cheap these days!. I have a 2006 9 and currently it puts out 426HP. You will be suprised how easy it is to get some real power out of them. Let me know if you have any questions! Oh yeah, do you go on evolutionm.net? If not you should. You can learn EVERYTHING about evos as well as find tons for sale.