Here is a G3 dynoed on an automatic done by a respected tuner. It lost power over most of the power band except at the top end. When he removed the bumper it tested
much better. Also, Tony at Fast Intentions has not had good luck with the G3 at all.
The forum doesn't allow a direct link to 370Z.com, so change the 370x to 370z.
http://www.370x.com/MagazineArticles...no-Thrash.aspx