If your really wanting to do this swap even though you have been told its not worth it and there are other routes you should explore then heres what you need. A complete sti engine (this is turbo, heads, intercooler, oil pump, EVERYTHING!). A sti transmission. Depending on the year transmission you could need all 4 axels, rear diff, driveshaft, dccd brain, dccd controller, all hubs, all 4 brembro brakes, 5x114 wheels, seals, slave cylinder, clutch, flywheel, shift linkage and shifter assembly. And I'm not even sure if you would need a sti ecu and wiring harness. Now factor in labor, downtime, gaskets, fluids, and other small unexpected stuff and I think you would be lucky to come out with 15k total in a car thats almost 12 years old and still dosent have all the features or perform as well as a real sti. If you really can get a sti engine and trans for 3k you should jump all over that as long as its legit. As you said, you have only had the car 2 weeks. Enjoy it some first. If you really want sti performance without breaking the bank just buy a vf39 turbo, sti intercooler, tbe, and a tune. If you want the drivetrain throw that in as well. Slow down, read, search, and take it all in grasshopper. We are here to help but cant help people who refuse to listen.
06' wrx tr