I ordered the a zex wet kit for my 99 cobra. My car has 113k miles,i was gonna spray a 75 shot to start with without upgrading anything. i plan on takin the car and getting it tuned with the 75 shot. I was wonder if it would b safe to do this being that my cAR has 113k miles. Can i spray a 100 or 125 safely? i dont drive my car all the time maybe 2 times a week. Also i have 4.30 gears will that be ok with the nitrous?