Hey Darren! I'm from F150online, too. I just ordered my Gryphon on Monday and can't wait to get it!
If I understood Corey correctly when I talked to her on the phone, the 87 economy tune and 87 performance tune are basically the same. (Bill or Corey- correct me if I'm wrong) I don't know about the 89 octane.
I ordered two customs with mine; 87 performance and 93 performance. I was going to get the 87 economy and that's when Corey said that the 87 performance and economy are the same. They could have charged me for three customs and just let me go on thinking I was doing something, but she told me I only need the two. If in the future I ever get something to tow, then I'll order a towing tune; for now it's just drag racing!
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