First off, do a compression test and make sure your motor is in good working condition. You can go up to a 75 shot dry, which is the kit to go with. Single fogger wet kits are plain trouble. I would go with a Zex kit. It's great for beginners, and IMO the best kit out there for under a 75 shot. It is a dry kit, so while spraying it adds fuel pressure to your fuel system to supply the needed fuel. It adjusts the added pressure according to the pressure of the nitrous, so you always have a good a/f mixture...no fuel pressure safety switch needed. The stock fuel system can handle the 75 shot. You will need one or two heat range colder NGK copper plugs, gapped at .030" for nitrous. You will also need to retard your timing on a 65 or 75 shot, 55 shot you can use stock timing. I was running 4 degrees of retard on my LS, but it was too much, so start at 4 and check plugs...slowly add in timing. As for the install, it is VERY easy, and yes, nitrous is VERY worth the money. I haven't heard of the Zex filter, post up a link or some info about it...I'd like to see it.


General rules of thumb:

1. Don't spray in 5th gear
2. Don't spray under 3k rpms
3. Don't hit the rev limiter (kaboom)
4. Don't spray 2 runs in a row, let the car cool a bit, nitrous burns hot
5. Don't spray for more than 15 secs at a time

Basically just be responsible about using it, and you'll be fine.