hey, its usally $500 for the chipped ECU, another $500 to run the hondata software and you have to tune it. Well you can just install and go, you can just run the preset program, if you want to go more just tune it.
G35 is just a 350Z thats a little bit more comfortable. same engine same transmission components, rear wheel drive, and also about the same weight. Of course it has lots of room for power, lots of turbo kits, twin turbo kits and a couple of supercharger and turbo combined kits. Nissan has nismo doing their tuning, they love the tourqe, super fast off the line and the holds the power very well. If you love the look, go for, its a very well made car. just the 3.5L engine you gotta be willing to pay the gas, lol
If you are buying it, I'm gonna save up and by a 350Z so I'm not going to be mad slow if I'm driving with you, lol
RSX is running 16inch rims with all season tires right? 16inchs is the standard, if you go any bigger you will be losing grip. Now tires has to be Z rated for the best performance wise and speed handling, then the sticky the better. I don't quite remember the stock tire pressure of the tires, you want to run 2 psi lower on a hot day and rise it 2 psi on a cold day to account for the pressure expansion etc. But those numbers are not the standard, you have to get what you feel most comfortable driving. Don't lower it too much then your tires will be taking some damage. The brands are different, Yokohama, kumo, mitchellan, pirellis whats most common. There is a new brand that actually doing very well, and its quite cheap, its called NEXEN, its Korean. If you want to go to the track a couple of times in the summer, I suggest getting another set of rims, either to upgrade the looks of your car and run stocks for track or get a set to run track. If you want some I can find you some cheap ones or look through usedottawa.com and there might be some good ones.
As for the brakes, you are running stock now, and you said CAI and Cat-back, ECU later on and some other little things. If your car comes close to 250hp at the wheels, I would say upgrade the brakes. You don't need a big brake kit if you don't want to, its really expensive. Just get cross drilled and slotted rotors and I think that would be enough, thats what I plan on running cause I don't feel like paying over $1500 for new brakes.