The key is choosing the correct H.P. for a given application. A kit that uses the correct factory calibration does not usually cause increased wear. As the energy released in the cylinder increases so do the loads on the variuos components that must handle them. If the load increases exceed the ability of the component to handle them, added wear takes place. NOS kits are designed for use on demand and only at wide open throttle. Nitrous can be extremeny advantageous i that it is only used when you want it, not all the time. All NOS kits are designed for maximum power with reliability for a given application.