I'm running a 100% stock engine.
Increased flow isn't always a good thing, when your return system/mechanism is unable to keep up under cornering.
I'm also tuned for 7800 RPM, but I don't make it a habit to stay up there.
I never actually expected a stock engine to last this long, but I also have more supporting mods than most, and probably more tuning hours (2 days with Bill and 80+ with Zach at @
DeliciousTuning on the turbo tune alone) than most too.