Hey guys. New to the site, didn't see a page to introduce myself so I figured I'd just jump right into it. I'm driving an '06 speed6 which I bought in... October? of 2012. I love the car, it's my daily driver. I've put about 15,000 miles on it since I got it. A couple months ago I started to notice a little bit of a stutter at WOT. I did some googling and found a guy on another forum who started a discussion about how to fix this exact kind of problem. His advice was to take off the intercooler, take out the coil packs, stretch the little spring that's in there so that you know you're making good contact, and then reinstall it all and kapow, it should work fine. SO. I buy decently expensive new plugs from an auto parts store because I figure as long as I'm in there, may as well replace them. I get my intercooler off, replace the plugs, stretch the springs, reinstall, and drive away. My problem only intensifies. So I go to the Mazda dealer, meet Danny, get turned onto this site, and spend about $100 on plugs. I'm waiting for my engine to get a little less toasty now so I can install the new plugs, and I guess my questions are: 1. Did I just waste 100 bucks? 2. If so, what is my actual problem? 3. Can I put plugs in this thing that don't cost $20 a piece without creating any problems? Thanks a lot guys. Looking forward to being an active member here.