I been using that gauge for over 3 yrs now and with over 70,000 mile on it it still registers fine! I use it on a NA set-up but was originally intended for a supercharger! Still reads right on point! Verified that at the last dyno....within .1
the guage installs pretty straight forward. weld in the bung, wire it up and go.
the only problem i have with mine is the plastic that makes up the housing is weak and melted in the florida heat of summer in my dash pod. it still works perfectly however, but they definitely cheaped out on the housing
install took 20 minutes, just remove one of the rear 02 sensors and put the wideband sensor in place of it, that is if you have the rears turned off...
i got mine so i could tinker with the fuel tables on the predator without being scared of uber lean-ness