I have stick...
As for where the fogger should go, I put mine about 1.5 to 2 feet away from the throttle body. Its kinda in the middle of the intake if not closer to the filter. I have a short ram...when I talked to Zex, they said anywhere 8 inches or farther away from the throttle body but personally I'd put it near the filter if anything...Zex also said that they have a lot of people who put it far away and that they also have heard of people who put it right by the filter in a cold air intake...It just allows the mixture to blend well before getting into your motor and that there is NO power loss since its hitting at about 900 to 1000 psi.....So put it at least a foot away I'd say.....its safer and worse comes to worse you'll be getting maybe a little less nitrous if anything than putting it closer which is obviously better than too much nitrous.
As far as engine wear and tear...detonation and running lean are the major causes but if you already have damaged parts, using nitrous will only accelerate these problems. I honestly believe that if you check your plugs regularly and make sure you do all the maintenence and check ups on your car and motor that nitrous will be fine for your car. There will obviously be some wear and tear though...
As for me, I've been through half a bottle now and will probably go through a couple before winter comes and thats when I'm planning to build my motor...pistons, rods, rings, sleeved, etc. So when thats done I plan on squeezing 100 shot until next summer when I'll have money again for my turbo setup.....:thumbup:
Good luck...