These bad boys do have a few ponys left to find
"Member Question: Is there something more complex than monitoring the A/F ratios and knock sensors fooling us into thinking we have a good tune on our cars when we really don't? Most people are tuning with a sniffer on the exhaust or a bung into the exhaust manifold. Any help is appreciated - thanks. I'm of the crowd who really appreciates the starting point you give us.
SRT Engineer: If the general public believes that the calibration engineers leave any ponies on the table when competative pressure around Detroit to one up the industry are so politically charged, they are wrong. This is a bunch of racers and we want always to win. If a change is made to hardware such as long headers which we could not certify for emissions or noise, Fuel air and spark need to be modified. We are also sensitive to the cost of our vehicles and spec the parts to meet our functional objectives. Some components may not like being pushed harder."
If you live somewhere that doesn't care about emissions or sound, then you are good to get more power