Here is my results for Stillen and Cobb A.P. tune . I have been working with Cobb for awhile on this. My Injens go on next week and are being tuned at Cobb too. Also Cobb says that their dyno reads 5-7 % lower than other dyno. I will post a link to that thread ..

Stillen Headers Thread ....

http://myg37.com/forums/showthread.php?t=186937


Injen Thread ....

http://myg37.com/forums/showthread.php?t=187080

 

nice bro good to see you got some nice HP gains with the headers...and i hope you can get your torque up there too!! thanks for the review