NX's Automatic Bottle Heater (PN 15940) uses an electric blanket to maintain between 950 and 1,050 psi.
Do Find Out What Accessories Come With The Kit (If Any)
Accessories will really depend on the kit. A wide-open throttle sensor (WOT) will come with a lot of LS1 kits, however, something like NX's MAF kit comes with a TPS sensor for Corvettes and the '05 GTO (since they have electronic throttles). There are a lot of other accessories that are available-some are important and others are just a convenience. A nitrous pressure gauge, bottle heater, NHRA fitting, and blow-down tube as well as a purge kit sometimes come with the system or can be bought in a package to save money. A bottle heater and remote bottle opener are also very convenient and easy ways of maintaining optimum performance and operation. You want to stay away from bottle openers that are inline with the nitrous because they will restrict flow; instead, look for motor-style operation on top of the valve.
The cross section of the NX solenoid reveals its advantageous design in providing a much more direct flow path for the nitrous.
Do Think About The Design Of The Kit
While most wet kits use similar types of fogger nozzles to atomize the fuel and nitrous, there are many other types and designs available. Fitment and personal preference will be the deciding factor, particularly between something like the the typical spraybar kit and the Nitrous Outlet Halo kit. Solenoid design seems to be a little more clear-cut, however, as Nitrous Express and Wilson Manifolds both use similar designs, which flow better than the standard style solenoid. Since port flow through the solenoid determines how it will perform, Wilson/NX use a more direct flow design in the solenoid that places the purge port in the side (built into the body). The standard solenoid has two 90-degree turns in and out, whereas the NX/Wilson only has one and the purge occurs after in the solenoid.
The NHRA Blow-Down Tube (PN 11708) and Pressure Relief Fitting (PN 11709) will help you stay legal and safe.
Do Make Safety Your Number One Concern When Using Nitrous (Staying NHRA Legal)
Using the right equipment and not trying to take the cheap way out is the first step in staying safe. One mistake I see on some first-timers is that, instead of buying a purge kit, they try and blip the nitrous in the burnout box, Pro Mod-style. They pop the nitrous to get it into the motor and let it out really quickly, but it loads the system up too quickly and causes a backfire. Before going to the track though, it is a good idea to make sure you are NHRA-legal, or else you might not even pass tech inspection. Virtually all bottles come with a blow-off valve for safety, and this prevents the bottle from exploding with excess pressure. A burst disc pops at 3,000 psi, however, you need an NHRA valve threaded on both sides to connect to a blow-down tube to release the pressure outside the car.