A little info about NOS. When determing the aditional HP for a certain NOS set up, the engineers use a Chevy 350 engine as their test bed. Since your engine is much smaller than 350ci that amount of NOS will more than likely not equal 100 HP on your engine. As far as "x-osting" (Spelled exhausting FYI) the spent gasses after the NOS is burnt in you cylinders, there isn´t much difference in the amout of Gas produced from a nornal cumbustion cycle. You only ad a slight little spray of NOS per Cylinder, and a slight bit more fuel, so what is left is only slightly higher. The Magic of NOS comes from the combustion pressure increase from the faster and hotter burn of the air fuel mixture. The main power ingredient in NOS (N2O) is the Oxygen atom. At high temperatures the oxygen seperates from the two Nitrogen atoms and is allowed to mix with the fuel. The added Oxygen to the combustion prosses allows the fuel that is added to be burnt more thuroughly. The Nitrogen atoms keep the combustion under contol to avoid a huge explosion. That is why adding pure Oxygen to your intake would be a big NO-NO. Anyway to answer your question, whether your engine can handle a 100 shot or not depends on a lot of things, mostlysetting up the kit properly, and making sure you have a good, sound stock set up. I´d do a compression check to make sure you don´t have too much blow by, because if you do, the NOS is only going to make the blow by worse when you hit the switch, and you won´t get the full potention of the shot. Also make sure your ignition system is operating 100%. One missed spark and kabloowy. As much as us guys hate to read instructions, make sure you read through the manual cover to cover before you even pop the hood. An air fuel ratio monitor would be real helpful too. If you dare see any leaness in the mixture, let off the switch ASAP. It´s the heat from the lean mixture, or bad ignition that can damage your engine. NOS itself is harmless, it´s the things that could go wrong with the combustion process while NOS is being applied that causes the nastyness.