Closed your other thread and changed the Title on this one.

You have a 07 base model with a L26 motor, not a L36. L36 is 95-03 only, L26 is the new design,

Platinum plugs and MSD coils are junk. You cant up horse power by changing the ignition system, the car can only produce so much voltage, swapping coils and plugs can't change that.

Iridium plugs and copper core plugs are the only plugs you can run in these cars. Anything else will run like ass and cause problems.

Read the Modding thread like posted above, it has info you want. And the 07 PCM can't be tuned, you would have to buy a different year (04-05) and get that one tuned, and your gas gauge will read backwards. I suggest alot of reading to understand how to mod these cars.