I wanted to start working on my car but I have a 3.9L v6 mustang new edge. I was wandering if you could install 3.8L modifications because there's no difference?.

 

Welcome to the forum. Two things to suggest:

1. Use a more descriptive title to your posts. Simply posting "help" doesn't do anything to lead someone to your question. Many will scroll right past it. Use something more descriptive like 'is there a difference between the 3.8 and 3.9 V6"

2. Post in the correct sub forum. Every generation has a section devoted to it. You have posted this in the sub forum for: so unless somehow your question about the 3.9 and 3.8 has to do with how to use the forum then obviously you are in the wrong section.