Very well constructed gauge. The EGT probe is simple enough to install as long as you have clear access to your exhaust manifold, a good drill, a sharp 21/64 drill bit (or type R) and a 1/8 -27 NPT tap. The steel braided wire coating gives me peace of mind concerning burned wires. The wiring instructions are clear and easy to understand. I purchased the 60 psi boost gauge and two hole pillar along with the EGT gauge and they work flawlessly together. I definitely recommend GS gauges. You get what you pay for. These are good quality gauges that will give you correct readings. If you are like me and concerned with EGT's, don't cheap out on gauges. Get good quality name brand stuff. Good gauges are always WAY cheaper than engines!