Most sites claim up to 10-11hp gain from a set of underdrive pulleys, is that hp increase legit and actually noticable? At high/low rpm range? And is it worth $200+? I'm trying to squeeze some more power out of my car, this seems like an easy way to get a few extra ponies, simple install at least. I just have a hard time spending over $200 on a couple pulleys, seems ridiculous. The Turner kit actually comes with 3, one for the alternator as well, but it's also $250 plus shipping. Looking for someone who's got a set on their car to fill in the blanks for me, thanks!

Rouge Engineering - $195 +s/h
http://www.rogueengineering.com/mm5/merchant.mvc?

UUC from ECS Tuning - $230 free s/h
http://www.ecstuning.com/BMW-E46-330...nce/ES2777201/

TMS - $250 +s/h
http://www.turnermotorsport.com/show...t-e46-325i330i