Accuracy can be a problem since wide bands are very sensitive to air leaks. Also, this is digital electronics so it is super important to have good voltage and good grounds. Everything has to be super tight and you don't want interference from ignition wires.

But air leaks are the big killer. Any extra air coming into the exhaust will make the gauge read lean so you can really chase your tail if you don't have the exhaust system super sealed.

Not trying to talk you out of it at all, just make sure your exhaust is sealed tight as a drum and that you follow the instructions on wiring exactly. These things are not like an old school oil pressure gauge where any fool can install one. You have to be careful with a wideband to get accurate results.