A little background on the car. 128,000 miles, fresh tranny rebuild (stock rebiuld only), and 3.73 gears. I would like to bump the car's HP and i'm figuring that NO2 would be the cheapest and least harmful to the motor as you can run NO2 when you want as to supercharger runs all the time. With a motor that has almost 130,000 miles on it, would it be safe to run nitrous? What would be a reasonable hp shot without destroying anything? I know the price of kits but how much is installation...approx? Can I do it myself or should it be done by pro's? ANY help on this subject matter would help. Thanks alot.