Yeah there's NOS kits you can buy but they're probably not too effective .... they use the gas bottles from a whipped cream dispenser ...... Soda Syphons use CO2 but the whipped cream dispensers use NOS ....
When NOS is injected it causes the cylinder to lean out so a proper system should inject added fuel along with the NOS ......
Car systems that I've seen inject NOS from one side and extra fuel from the other side ...... both are controlled via electronic solenoids ......
Ha Ha ..... I found a link with info on NOS and we are on it at the bottom ......
How does Nitrous Oxide System (NOS) work?