Quote Originally Posted by BwolfGT View Post
You'll need a tune or a tuner.
Just confirming, he is 100%. Your PCM needs to be modified. The good news is a tuned PCM is a great upgrade; the bad news is it won’t be cheap.

Also for general information, I believe the 04+ N/A GPs speed limiters are set to 108 mph, if my memory serves. I would assume this is because of the stock “S” rated tires.