This kit can be used on stock cars but I recomend a better fuel pump at the least. I Hooked up nitrous before they made a kit specifically for the V6. NOS now has a kit made just for the V6 that is adjustable from 50-80hp. Its the 5124 kit.
I aslo recomend a better fuel pump because the nitrous is going to want to burn alot more gas alot faster if that needed fuel is not there then you could have detonation which can cauze internal engine damage and head gasket failure. Another thing you may want is higher flowing fuel injectors. They are not needed but would help.
I also recomed an aftermarket performance chip to remove the speed limiter. The reason I recomend this is because if your running nitrous and you hit the speed limiter the fuel will cut off but the nitrous will cotinue to flow and that is not a good thing. The chip will also reduce timing which can prevent detonation. The best chip for nitrous use would be a flip chip. A flip chip is one that has 2 modes: one for normal street driving and one for nitrous use. These would be most efficient and the best way to go. But watch your wallet flip chips are expensive.
I used a blow-down tube with safety fittings from NOS to vent all nitrous from the car in case pressure in the bottle reaches dangerous levels. The average bottle runs at 900psi. And the only time you would ever have to wory about rising bottle temperature would be in extreme heat, If you use a bottle warmer never forget to turn it off. Ive seen trunks of cars blow threw garage doors because people left the bottle warmer on.
Another handy item I bought was the remote bottle opener which allows you to open and close you bottle with a switch. I mounted mine in a custom swich panel made in the existing AC vent along with the main nitrous switch as you can see in the picture below.
The biggest pain when installing nitrous is leaks! I must have almost went threw an entire bottle trying to keep all the fittings from leaking. The manuals say not to use tephlon tape yet it was the only way i could get it to stop it from leaking. If your going to use tape just be sure not to get and into the lines.
Below you can see some basic pics of a NOS kit installed on a V6.
I recomend a push button setup of some sort. This way you can only use the nitrous when you want and when rpm levels are safe. Also its a BLAST slamming that button and blasting the competition. Another method would be an MSD window switch, This will allow the nitrous to be turned on and off automaticly at rpm levels that you select. Pretty cool. I have one but have yet to install it.
25 Horsepower: Nozzle = 22 / Tee = 59
50 Horsepower: Nozzle = 32 / Tee = 42
75 Horsepower: Nozzle = 42 / Tee = 59
Ive tried all three and they seem about right. 75 is great along and 25-50 works well with the supercharger.
To keep system running the best it can be sure to check and clean in line filters after every one or two bottles. Its also a good idea to check for leaks frequently, that nitrous is expensive and you dont want leaks.