I would Rec C2 motorsports. Some vr6 friends nearby have been very happy with thier tunes by them.
Better mid-range power
Improved overall drive ability
Increased rev limiter to 7200rpm
Deleted speed governor
Secured off-idle control
Optimum A/F ratios
Do not know actual power number, probnot much but it will run smoother and have a little more gitty up.