Don't trust your factory gauge for important monitoring of engine functions. By the time your factory idiot light comes on the damage is already done. Monitor you engine functions with one quick glance and notice any problems before it is catastrophic. (0-100 PSI includes Sender, Mounting hardware, Visor, Decals and Instructions) NOTE: Be sure to check out our Oil Filter Adaptor Plate to make installation of the sender easier. If you have a Subaru- we do carry Oil Galley plugs to enable you to screw this sender directly into the engine block.