Alright that makes a world of sense to me. I was just really confused because I was seeeing a lot of really modded cars with units like an SAFC II still there, and I was pretty sure they had an Ash ECU or someone's eprom in there. A unit like an Apexi AVC-R will also aid in my power band if I decide to go with Bigger turbos that may have lag. Bigger turbos like sport 700's wouldnt be a reason to get an AFC right. The only reason an AFC would be if I didnt go with a Custom ECU. Just checking Because I know people with an AFC as well as a burned Eprom and in some cases a piggy back as well.