well im new to this forum and this website. But i have a 99 mits, eclipse gs. ANd i was interested in putting a underdrive pulley in it. I was just wondering just how easy/hard it was to do? any one have any experience with this. let me know.

There are at least a few different brands available. Check in the "things we've seen before" message section for all the info. There's more info there then I could list in this message. It's a good mod!

Pretty straight forward install with the right tools. Just dont break the crank bolt like I did :) . Also make sure you heat the pulley up for 3 hours @ 450 in the oven. Or youll need to have a good quality impact wrench. These things will make the pulley install back onto the crank easier. As far as it being worth it .... It is way worth it the gains are very nice and very noticeable.