So I have a 2005 Automatic V6, with just over 41k miles on it. I got the car a little over a year ago from my grandfather, and he took good care of it, and never drove it hard. I've done some work to it, and through many months of debating, I've decided to make the jump to add nitrous.
Like I said, my car is an automatic, has 41k miles on it, fluids changed regurlarly, but since I've had it I've pushed it at full throttle a good amount of times. (that normal I suppose?

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I have a BBK cold air intake, custom true dual exhaust, and a 93 octane tune.
My sights are set on the Zex wet injected nitrous kit with a window switch and the dual purge kit. I want to start out with a small shot at first and work up to no more that a 75 shot right now.
I'm just wondering if my car is ready for it. (By ready, I mean is there any more I have to do to it to take full advantage of the power, yet still keep things pretty safe) Will I need new plugs? Wires? (Should I just get a coil pack and wires too while I'm at it?) I have stock gears, so will my rear end be ok? I know I'll have to re-tune it... Am I missing anything? Should I be ok with what I have?
I just want everything to work right, and take full advantage of the extra power. I don't want something to go wrong because I overlooked it... I guess that's why I ask you guys...
Sorry for the long post, I'm trying to be thorough. Thanks guys.