Bringing this one back from the dead, Fast forward The IC is installed. Im going to be doing a reservoir. I picked up a universal from Autozone, the cap isnt pressurized. Do I need a pressurized unit? The videos I see on You tube show guys using the 99 style GP coolant bottles. But when I pull the T fill cap it is pressurized. so Im a tad on the fence on which way is correct.