Hi, i have look at pretty much all the nitrous threads here and didn't find quite what i was lookin for.

i have a 2000L 400rwhp, on a stock block,i am looking to buy nitrous. i see rob says zex is the easiest way to go but NX is the cheaper way to go. if i get nitrous and get it dyno tuned do i still need a wideband a/f and is there anything i need to change in order for my nitrous to work. i am just trying to find the best set up for the best price of course. and was wondering is nitrous pushing it? is it a safe mod to use since im only 400 rwhp?

Thanks for the help.