that only says you are either responsible or lucky. Honestly in a small block motor untill you get above a 150 horse shot your are pretty safe. the blow down tube is for when ever u have a bottle in an enclosed space. id especially not want a trunk full of N20 in my car with dual trunk mounted batteries a fuel cell and 2 fuel pumps the size of lantern batteries.

the point is with somthing as in depth and finicky as N20 all it takes it touching it off while at idle , having a low fuel issue or a mucked up filter to do some damage. Im just trying to stress the fact that he should definatly research every aspect and hazard before spraying his daily driver thats really all im trying to convay. Guys i know who spray spray alot more then some small 100 ot 150 or 200 horse shot but they also flat out dont care if they pop a motor because they arent daily drivers. They will rip it out and rebuild it or replace it with out batting an eye. I just dont want to see somone fuck up their daily driver to gain so little. whats a hundred shot gonna do give a stock truck a couple 1/10s?