~$50 Ebay underdrive pulleys OK?

[marcdh]

I recently installed a Cosmo UDP on my k8 car as my crank pulley frisbeed half of itself off!

I have been running it for 2 weeks. No bearings have exploded yet... I can quite honestly say I have noticed the difference. It's more responsive for sure, my highly inaccurate stopwatch 0-60 indicates maybe half second+ gain*. Also the car seemed more keen to shred my tires throughout 1st gear, which is where you really notice it (and a bit in second).

I wrote a guide on my UK local forum http://www.uk-mx3.com//forum/viewtopic.php?t=1128 Shows what parts you what parts you have to cut off.

*maybe suffering from a placebo effect

[Aston Wards]

8WHP is a decent amount, especially when it costs so little to get.
But personally, i feel the biggest gain is the responsiveness of the engine, that is GOLD!

with that said, i've only experienced an ud pulley on my Zed's, but i'm sure it would be the same in an MX-3