86k miles on a Zetec running a 75HP shot.
No problems yet.
Just keep an eye and ear on the engine.
Take safety precautions, like a window switch and a fuel pressure switch (and maybe a nitrous line filter).
Go two steps colder on plugs.
Retard ignition atleast 2 degrees, I did 4.
Run a higher octane gas, don't just add octane booster from the store.
Make sure your fuel system is up to par.
Check compression, and do it often.
Get a book and read about it.

I'll be the one to say it, its not NOS, its N2O or nitrous.
NOS is a brand, it stands for Nitrous Oxide Systems.


Frank McCoy aka Mod-deth aka Mid Life Crisis aka SVT Doood aka mcgainer is a SCAM ARTIST Pre98 Zetec - Some Mods