Just wait till you get more mods or an intake, of some sort, alot of the tuners I have seen dont really net a gain of HP persay but help the car run a quicker et especially the auto/l99. An intake and tune should be good for about 20whpThe Power Curve is better from 3,700 to 4,200 RPM then quickly falls to 188hp at 6,000. I am just going to use the tuner to turn off AFM so I guess its not a total loss just yet.