First off, holding back information like that is one way NOT to make friends here.It is beyond me why anyone would even mess with the coils on a nearly new car. And then put some old a$$ parts on it. My last GP I had for 6 years and never touched the battery or the coils, what are you doing to your car!?! If in fact you really ever did have a problem, I doubt it is fixed.
As far as moding your car, I already gave my opinion on that but I’ll bite on your new questions.
#1 Your car all ready has an equivalent to a ZZP stage 1 throttle body. And PLEASE stop calling it a bottle all the flipping time!
#2 Putting a new intake on won’t give you measurable (or felt) improvement. Leave it like you have it, stock with the K&N filter.
#3 A new down pipe might give you little something, but IMHO isn’t worth the money. The U-bend restriction on the down pipes of older GPs is already gone on your car.
#4 Not many people with 07s have replaced the PCM, but it has been done. That said, I’m also not aware of one case were it went smoothly. And of course no one seems to want to share this information a whole lot. I was just reading on 3800tech someone did it. But they had to go through the PCM and address a bunch of codes it was throwing, including blocking out un-needed air injection.
Seriously, you haven’t a clue about what you’re even asking. You need to read like every sticky on this forum before even asking more questions.
Oh, and your welcome.
