I was worried at first about how difficult it sounded but the change went very easily. Of course getting to the plugs was the hardest part but it was well worth the time and effort to save the $280 the dealership wanted to charge.

I went with the NGK iridium plugs same heat range as the stock ones and so far the car idles so much smoother than it did. The car is Cobb Stage II OTS map so I was a little worried about how the plugs might look but they looked a little reddish tan at the tips which I think is normal. I changed them at 59,500 miles and next time I think I will change them a little sooner.

So anyone who is intimidated at the idea of changing their own plugs, don't be. Think of all the money you'll save as well as the satisfaction of doing it yourself.

Can you link me or explain how to do spark plug changes on a wrx???

You have to pull the battery, the windshield washer reservoir and the air filter box. They are all pretty easy to remove, just a few bolts, screws each. I used this link http://forums.nasioc.com/forums/showthread.php?t=518633. I read some of the general questions then I followed the link to www.scoobymods.com instructions (with photos). You definately need some socket extensions and a u-joint (swivel socket attachment) to make your life easy.

It's not as hard as I thought it would be just give yourself plenty of time as not to rush anything. I just dove in and started yanking crap out and it went pretty well. At first I didn't know that the coil packs were bolted to the block but they sure are. Just let me know if you have any questions.

You shouldnt pull plugs on a hot engine. I have never personally seen this, but my old auto shop teacher told me that if you pull them when the heads are hot, then heads cool, and the hole can cool unevenly and it wont be round anymore, which hoses you trying to get the plugs back in. Not sure how common this is, but Im sure not going to try to find out. :)

....I agree with you Apenbullet. With the right tools and a little research, it's much easier than some people might think. ....I just did mine a couple of weeks ago. ;)