Oh one other thing,
The street heat kit can be made really safe, just use a smaller jet. It also takes about 15 minutes to install (seriously) and it costs somewhere around $350.
On my car:
.43 jet = +90/150 14:1 AFR
.55 jet = +120/180 12.8:1 AFR
It also comes with a .37 jet. I would guess its about a 50 shot, but I could barely feel anything when I used it.
The kit comes in a black gym back which sits behind your passenger seat. Everything is in the bag- jets, solenoid, bottle, etc. Then you plug a push button switch into your lighter, and the button opens the solenoid. It's completely controled by the driver. When you want nitrous you press the button. Just make sure it is over ~3500rpm and at WOT. You run a line through the firewall and into the air intake track before the MAF. Mine was in the fenderwell, so it was completely hidden. Ask the guys at Passen about that smile.gif
Nitrous sprays through the MAF and freezes it, which in turns tells the cpu to dump more fuel in to warm things up. It's pretty basic and not very reliable, unless you use a smaller shot.
Those are my experiences. It was a lot of fun to beat people and have them look over my entire car and not be able to find how an obnoxiously loud dual exhaust V6 beat their transam. w00t