Your motor will be fine with a 50 shot. The only thing that would totally destroy the motor would be detonation. I would suggest a wet kit for your nitrous because fuel and nitrous are sprayed in proportion for the best nitrous/fuel mix. The dry kits increases fuel pressure from your injectors so it relies on the health of your injectors to function properly. At least with the wet kit I don't have to rely on the injectors. I think a dedicated fuel flow from the wet kit is more efficient because it has it's own fuel supply. I have the NX wet kit on my CRX D16a using the 50 shot and the power pulls are awesome. My air/ fuel ratio stays stable once I spray, never goes lean. You can also get the fuel pressure safety switch so for some reason the fuel pressure drops below 35psi, the solenoids are disabled to prevent nitrous flow. I was going to go with ZEX at first but decided to go with NX because it has more options if I decide to upgrade the system for more power. NX has more wiring but it is simple to install and has actual WHP. Don't forget the A/f gauge, colder plugs (ZEX or NGK-bkr7e), and a strong clutch. The stock clutch won't hold the spray overtime. We get our A/f gauges from
www.dynotune.org they are reliable and accurate.