I had #1 COP replaced in December and now am having to replace #3. The repair shop has suggested to replace all for $900. I am not spending that kind of money today. #3 replacement is $325. I want to try and replace the remaining COPs myself. Which website do you recommend for purchasing the remaining COPs. Thanks for your help.

 

You can buy all 8 COP's on ebay for $10 each...here's the link:

Ford 5.4l COP