i saw a NOS brand kit called sneaky pete and think is just great idea a small nitrous kit but without the hasle of a big kit
im thinking of adding nitrous to my car but don't want to risk of blowing my engine using a 50 and up shot any info avaliable please let me know

 

That NOS system is designed for carbed engines only. IMHO dealing with any kit that runs of a 10oz bottle will be insanely annoying... you'll have to refill the bottle after every run...
If you want something brainless to install and run a small shot - go with dry ZEX setup.