i have an injen cai and i ordered the stage 2 from GM...i want to know what do you guys think about putting the ngk bkr7e with this setup and what do you recommends me to put after that to have a reliable cars with the more power possible...i was thinking to put the gmpp catback touring...thanks a lot

 

Those plugs do wonders for drivability, i added an exhaust to mine but really didn't notice much difference other than sound of course, but i have added Stage 2 and exhaust together i wasn't used to the new power to really have a reference if the exhaust did anything.

 

cool...i'm gonna wait a little before putting the new plugs just to get use of the stage 2 and to see if the plugs make a difference when i do the swap