We dyno tuned (2) Legacy GT's the same day last year. They had nearly IDENTICAL mods except for one thing (turbo and headers) Both ran the same peak boost and used the exact same ramp rate for spool up which is locked in shootout mode.
The higher graph represents a tuned VF52 car, with Racer X FMIC/intake and stock headers, stock fuel.
The lower graph represents a tuned VF46 car, with Racer X FMIC/intake, stock fuel and unwrapped tubular headers.
A tad too close for a additional consistent 35whp and 48wtq?
Let the results speak for themselves: