[ax0n]

505K6 - That's the accessory drive belt you're gonna need (if you have Power Steering and AC). I had to try about 3 different belts from the parts store before I got it right. :x

 

[PonyExpress]

I'll check tomorrow and post the belt required for cars with no AC or PS to use the 25% UDP.

 

[wrench]

I needed 427K6 for the 50% udp on my 94escort with no a/c or ps

 

[RedIntake]

Here's a list of the sizes for the 50% pulley: http://www.escortfocus.com/html/udp.html

And a list for the 25%: http://www.escortfocus.com/html/_udp_2.html

!! 2.0L SPI (w/o AC) requires a different belt than listed, NAPA part #060435 !!