a dry kit is installed outside of your air filter, injecting nitrous or NO2 into your air filter, NO2 then passes through your MAF sensor. A wet kit, injects nitrous closer to the engine on the intake still but NO2 doesn't pass the MAF. and a direst port system injects directly into the engine via intake manifold.
I heard wet kits are better for the S197s, and If i were you i would buy the whole kit. ZEX is good because it has a pedal switch, that engages once you put the pedal to the medal. im not sure if you know about spraying too soon.... bad things happen. Yes the shot counts on your mod list, 75shot on a wet kit will give you atleast 50+hp, maybe more depending. dry kits will be worth a little less.
2006 Vista Blue Mustang GT: Mods: ||EdelBrock E-Force Stage 1// Brenspeed 93 Dyno Tune// Pypes LT headers, O/R H-pipe// GT500 Fuel System// Borla Stingers// MGW Shifter// Hawk HPS// Powerslot Rotors// CHE: UCA / LCA/ Anti-Squats/ K-member/ Panhard Brace// Nitto NT555's (daily)// Infinity Sound// CDC Chin// MT ET Streets (track)||
447rwhp 419ft-lbs - Stage Zero
* 466 rwhp 441ft-lbs - Stage 1 *