IMO UDP's are the best bang for the buck that you can buy. You can get moe performance gains from lots of other things, but UDP's will give you noticable performance increases with minimum money. There are several kits. I have the Ford Racing on my car. I would not but a 3 piece kit. Not worth the additional $$.
My ZX3's an '02. I've had the pulleys on since new & have experienced 0 problems.
Get'em.
____________________ If you can't read this, you're illiterate.
Honestly, UDP kits are really not worth all that much for horsepower production. Dyno tests show that they aren't worth more than 1-2 WHP on a mild Zetec. Sure, they are relatively cheap, but IMO, save that money for something worth a bit more power, like a good set of camshafts.
____________________ Lookin' fast in the slow lane