Gauges are a great add-on to many cars. Most enthusiasts don't pay gauges much attention when modifying their cars. Many view them as unnecessary and something only reserved for the most expensive and time-consuming builds. However, many types of people should consider adding a gauge to the mod list.
If you're racing, gauges are a no-brainer. Especially in endurance racing, where keeping temps low is vital. Gauges give insight as to what's happening in the engine bay, and let you know if your car is in trouble before it blows up. Spending a hundred bucks on some gauges could save you thousands in the long run. Oil pressure, oil temperature, and water temperature gauges are generally recommended for racing purposes.
If you're driving for fun, gauges could be important too. Much like the sounds you hear, they give insight as to what's going on in your engine bay. Boost pressure gauges, when used in tandem with the tachometer, can help you get a more accurate reading on how much power your car is making. Not to mention that adding on any gauge automatically makes your car seem nicer.
Another example of a confidence-inspiring gauge is a boost gauge. Turbo lag can be scary and unpredictable, especially in older cars with early turbos. Building up boost in the middle of a corner can be scary. If you find yourself there, you’ll have to make a split-second decision to save your car. A boost gauge tells you about that buildup of power only milliseconds before your tyres do, but reacting milliseconds earlier can save you from a spin. A boost gauge gives you an accurate representation of how much power you’re making, giving you confidence when you drive. Safety, peace of mind, and confidence increase when you decide to add a gauge to your shopping cart.
There is a notion that gauges are difficult to set up, but that isn't entirely true. If you can do some basic wiring and know how to use a screwdriver, you have all the skills required to install gauges. Most cars have extensive aftermarket support for gauges and plenty of resources for installing gauges and gauge brackets.