The relative safety of a nitrous system is dependent more on the operator/tuner than the nitrous itself.....attention to detail is very important, if you pay attention to what is going on with the system and your engine, and you have a proper procedure for turning on, purging, using, and turning off your system the need for "safety" systems can be kept to a minimum....If you want the system to be fool proof then the safety systems will need to be numerous. At the power level you are talking about it is possible to build a system that will not hurt the motor no matter what happens, who tunes it, or just about anything else....it just will not activate if everything is not within safe parameters....expensive and not necessary. Don't want to go on and on here if you don't care, but if you have specific questions I will be glad to try and address them, and if I don't have the answer someone here should.