ok who has them and are they worth it? whats the deal. i know some UDP have been known to throw CEL does this apply for us as well???

what is a udp?

Under Drive Pulley.

Agency Power makes an under driven crank pulley. It will throw a CEL unless you reset your eccentric shaft position sensor (easy). Not a lot of a power to be had, the stock pulley is pretty light as it anyways, and you don't want to under drive your water pump too much.

Holy crap, I feel like an idiot. I have unorthodox racing underdrive pullies and it took about 30 mins to install all 3 of them. I dont really know if it made a difference because I installed my turbo at the same time.

I feel they are pretty much a cosmetic enhancement. That's because they look prettier than the amount of power you will gain.

OK b/c i was looking to pick up the ones from SRmotorsport.com

SR Motorsports pulleys are rather overpriced.

SR Motorsports pulleys are rather overpriced.
Tell me about it, I got'em ... look really good, didn't even tickle my butt dyno for performance however.