This was designed to fit a 92-95 Honda Civic. It fits right behind the steering wheel on the ignition/steering column cover and you have plenty of room for the wheel to turn without hitting them. This likely works for quite a few cars but you would need to double check fitment. The bottom is a little flexible so it does not need to be exact fit especially because you will use a layer of double sided tape to attach it.

These are designed to fit standard 52mm gauges. If you do not have a way to attach them my recommendation is to wrap painters tape around the gauge and do a pressure fit. That is exactly how my boost gauge is installed in this and it has been good for over a year. You may need to adjust this over time but it does work.

Also included is a piece that you can use to attach an AEM UEGO X-Series Wideband. The adapter works with the stock gauge and allows you to make sure it does not go anywhere. The old style AEM gauge will also fit but no guarantee on my adapter working for it.

***The AEM mount may need to be extended a tiny bit to fit just right for you. Experiment with it as it doesn't take much pla to print. You should be able to change the dimensions in most slicers once you figure out if it needs to be any larger. I have included 2 extra parts that are 1 and 2 mm longer than the original find the one that works for you.***