what is the difference between the old stage one for the hhr and soltice, and the one that came out for the cobalt. i just had mine installed with the part number 19212711. i tryed searching and cant find nothing on this number i have a felling they installed the hhr one . all i get is the new number 19212670. they game me the directions back and it only has soltice sky and hhr no cobalt what you guys think? whats the difference between the two? thanks

19212711 is the part number for the instructions, which includes your serial# for calibration. 19212670 is the part number for the entire kit, which among it includes part 19212711.

so im gessing the instructions are the same for both the kits

so im gessing the instructions are the same for both the kits

Updated instructions are available on GMTunerSource.com or Crateenginedepot.com