has anyone every done a nitrous kit. I ask about both questions because correctly install nitrous requirs a tweaked/modified ECU. and on that note any mention of companies that will tune 5th gen ECUs?

 

Go look in the nitrious section. Yea it's been done, and still being done everyday on here. There's literally a whole section that has every answer to every possible question you could have. There's a wealth of knowledge waiting for you there. Also the many option of tuning can be found in the same advanced performance section. Your questions about tuning are extremely broad. Familiarize yourself with the different options it's not as easy as plugging a laptop into your ecu and doing what you want. It doesn't work that way unless you spend big money and even then it's not that simple. You're going to have to look and find and read the information for yourself. You'll probably need to read and study it like you're taking a class. Nobody can/will just sit here and explain it all to you. It would take a long time. There's no short cuts you'll have to put in the time if you really want the information.