Originally Posted by northvibe

The cobalt will benefit from GMS1, but it will be a "safe" for all states tune. It does not optimize the gains that COULD be. You can bolt all the parts on and feel a difference, but it will still try to command what it was told, it will just do this more efficiently.

Once you tune, with HPT, and really try to get as much as you can, you now have to maintain that, all year. WHich is not possible without retuning as the gas/weather changes. It is kind of a pita.

If you can get safely tuned for year round on hpt, or just run gms1, you'll be fine without retuning.

I @#$#@$ cannot believe people still use Trifecta....wtf.