Until someone shows me a Zetec that has blown up and the cause of the failure is directly attributed to the pulley, I don't buy the crap for one second.
Someone on Focaljet did a test of the AEM and Esslinger pulleys. Same car, same day. Esslinger made 1HP more which basically shows nothing. That can be explained by error. The ASP is considerably heavier and not as small as the Esslinger or AEM. So of those three (I introduced AEM)... Get a Esslinger or AEM, whichever you find the for the cheapest price and the prettiest color.
