In my opinion & personal experience: I spun a bearing a few months ago on my stock B16 when it detonated from running too big a shot of nitrous on stock fuel pump (too often). Some people ask why I have this "obscession" with nitrous but I just say because it's alot cheaper than BOOST & you still get a good amount of power. I'm currently using the Zex Dry Kit, a buddy of mine says he has used NOS, NX.. & says Zex hits the hardest (I personally woundn't know). A few tips if you use nitrous, make sure you get colder plugs, make sure you always have enough fuel by upgrading fuel pump/injectors & a good tune! If you have the money a direct port nitrous would be the best to get, than the Wet Nitrous , then Dry