I was in your shoes about a year and half ago. I was dead set on the "NOZZLE" kit like you pictured. After telling the guy what I expected from the kit, and my install experience(ZERO!), he recommended the N0S 5116 Dry N20 Kit.
After reading the directions a billion-teen times, I finally begain installing sections of the N20 kit on the car, and after a week of 15-30 minutes of work here and there, it was done. Not to bad of system to install after looking back and realizing it's just putting wires where wires go.
The kit came with everything for safe runs(just like the kit you pictured most likely), but this kit was about 1/2 the price of the NOZZLE kit, which allowed me to get the needed nitrous accessories like a great bottle heater (
www.dynotune.org , it's there HEATER/BRACKET combo...AWESOME!), an purge kit.
Very impressed with the kit, minus the crappy weather pack connections you have to BUILD in the kit. I ended up just cutting them off and sodering my connections, or male/female plugging them. I've ran the lowest jet, to the highest jet in the kit and the times below speak for themselves.
Got the kit from
www.lonestarperformance.com if it you wanna take a look.
Good luck......sure is fun! And I'm just an autox/road course dude....nice to flip the switch and have itall every now and then.