I purchased some ngk iridium spark plugs from moesperformance.com. I just thought I would search around a bit online and notice that moes claims the ngk iridium stock heat range plug for the 5.7 is part# 2314, but other sites list part #2313 as the stock heat range for the 5.7. Which is it? I ordered 2314. If it is one step colder, is this going to be a problem? I have the superchips tuner, afe intake, and borla catback... Any thoughts?