wow! how can you do that?? have the switches and stock seats, and still get them warm??? I want to do it!!

It takes a long time and it's not easy. You have to unwrap the entire seat (a lot more work than you think), install the seat heaters, run your wiring and then put the seat all back together. Once that's done start all over again and do the other seat lol. I started with my passenger seat incase I needed to drive my Z and then did the driver seat after I was more confident after the first one. All together it was about $100 in parts and took a day per seat to install.