Power to the rear
 

We are having the G tuned Saturday,, what gains should we see

Any thoughts

a little more info would be helpful ;) is it a 6mt? do you have other mods? what kind of tune? etc

yes manual tranny,
Stillen Cold air
M370
Motordyne cat back..

Thoughts: Go get it tuned, tell us your results. Doing it that way will get you a real answer and not speculation.

I guess ,, thanks

estimated 295 - 305 to the wheels

That works

Postponed tune,,,I want to add some high flow cats

Ill say with HFCs 305-315whp with tgat set up including the tune.
if you go test pipes 320+whp.
Motodyne makes some good stuff.

Similar setup on a dynojet I got 295 hp.. check my post. I dont think you will see much more.