Save your money and get some bitchin seats.
Pull up the seat cover and cut some seat foam (I used some stuff I had in the basement. 1" thick seat foam, it's not very stiff, which is good. It's the standard for seat cushioning. I used a double layer because I weigh no more than 150.)
Pull the cover down over the foam and re-attach (I used Zip Ties as a temp. attachment).
Voila. Save some money and get some comfy, supportive, seats. The only downside is that the seat now looks pregnant. However, a quick stitch here and there and you can make it look factory (my mom is going to help me with this next weekend since I can't sew worth a damn. I'm not sure how I got the merit badge...).
Since the car still isn't registered, I could only drive it around the neighborhood, but it feels great! Nice, big ass bolsters, and they took 20 minutes to install!
I have the most modded, non-registered Legacy Turbo in the world.
