My bad, I was looking at it backwards, used to seeing power first and tq second. I saw 395 to 509 and then 526 after your mods. I see it now. Thanks for clearing that up. Would you skip 1 7/8" headers and go straight to 2" headers or leave that for the PD crowd. Any thoughts of using a boost limiter of any source to pump up the low end since it is an A8. I know you guys do great work and actually run your cars so I am very interested to see where you go with this project. From what I am reading though the fuel system on these cars isn't as good as the C7 and may need a cam lobe and other mods to keep up. The goal for my car is high
9s@140 with losing as little drivability as possible.